I have a Linux workstation and a MacBook. The arguments about keyboard and trackpad are personal preference at best. You can use whatever external devices you want with the Mac. I used Logitech mice with mine too.
If you want a package manager on Mac use Homebrew. It’s better than you’d expect for a system that doesn’t include a native package manager. I use docker on both Mac and Linux and can’t really tell the difference.
I bought my last MacBook with 64gb ram. It was probably overkill but I didn’t see any reason not to since you can get one refurb for essential 50% off.
It sucks that you can’t upgrade the ram, so make sure you have a good idea what you need when you’re buying the machine. Anyone buying one with 8gb is essentially buying a Chromebook. That’s not adequate for a power user like you.