I do understand that Intel's do get slower bc of the garbage collection or what not.
No they don't.
I have filled and been using my drive extensively in Adobe. No slowdown issues, if anything it is running faster if you can believe it. Going on about 3 months with it now I think. I have been benching my drive religiously a few times a week and have not noticed any such slowdown.
https://forums.macrumors.com/threads/904069/
Thats the thread where I post my benches.