Hitting a wall with Maschine GPU Usage (Clipping, Glitches)

Your experience right here is one reason I just have a preference for Windows where possible. Your machine is 5 years old and on the cusp of being useless for your needs already tho even at the time the decision for a dual core CPU to do large multi-threaded work like DAW processing wasn't a good one. It's always a tough decision when you look at the ****** pricing Apple have to step up to the next CPU/Ram/SSD size and it's always done in such a way that you just end up spending that extra $1k on top of what you planned just so you can actually install a program and maybe run it for more than a week.

If you are already invested in the macOS land I would suggest staying there, especially if you do not have a good understanding of Windows performance and such. If you don't know what ASIO/WASAPI are on Windows and the differences between these, how to tweak Bios and performance settings in the OS to make things work the way you expect, stick with mac and just pay for the experience.

If portability is needed (IMO) a macBook is probably a better choice all round. Not to say you cannot get a capable Windows laptop for the same cost but it's more of a gamble especially around the audio performance and you will need an external audio card where Core Audio is typically way better in performance on mac than Windows (tho Asio4All can "sometimes" solve this). One thing macBooks are is reliable and reasonably trouble free. The issues with macOS are almost always based around new OS releases and changes in how their OS and security works.

If you are after something that you can really get the best performance out of and easily maintain and upgrade over a 10 year period, a PC tower cannot be beat (from my 30 year experience) but you will pay for this in time to learn how to tweak things and how to manage the OS in general. I am building a new PC once I get my tax return back because my main system is now 12 years old but can still run everything I throw at it because I have upgraded and maintained the components over time to squeeze everything out.

Intel Vs AMD is not all that much of a concern, at the audio level both offer pretty good performance these days (tho I prefer Intel just because of past nightmares with audio performance) so it is more what kind cash you can afford and what it is all compatible with. More important is matching things that will work best together (RAM with MOBO with CPU) which can be soooooo hard to do and takes a lot of research of benchmarks etc. I have designed and then had to redesign my system 3 times now and am scrapping it and starting over because the market has changed since I started months ago and some things are no longer available or new versions are out. My expected top of the line system cost including a new copy of Win10 Pro, 32GB RAM, 1TB System OS (and many other drives I have already) and some kind of processor (undecided) with a GTX3080 (maybe) will be about $3200aud with almost half that cost just in the graphics card for games. But at another 10 years that's basically $320 per year + upgrade costs.

Regards AMD x Intel. Intels draw too much power, so that it is difficult to cool it. New Intels to come soon have power limit exceeding 400 W! Also new big.little architecture introduced in current (12th) generation may cause problems to programs and is not ideal for audio programs. Unless programmers really do the best to make it work on big.little... Without special treatment and optimization for big.little Intel CPUs might be a nightmare. OK, one may switch off little cores, but then.... Why to pay for those cores, if they are more trouble than benefit?

Intel is struggleing past few years and it looks like will for few more... The fact that AMD gains more and more marketshare is not because it is cheaper, but because it is currently better choise.

when your computer begins to hit its limits as you so point out,,,

a consideration is to get another computer and run in it Tandem...

why constrain yourself to simply running audio on a single computer? *shrugs

plenty of options out there... which can provide a cheaper alternative and better native support for what is becoming older hardware!!(people always selling older computers to upgrade to the flashy newer models - this is oppurtunity!!)

the choice to buy a expensive single mega computer, is really up to you!!!!

I tend to gravitate towards older,reliable&value for money but thats me!! *winks

goodluck!