You can get some decent size external usb SSDs. I have the Samsung T5 2TB. I think they have larger models now. Works pretty well. And with USB-C speeds are very usable. You can probably get faster/bigger stuff via thunderbolt.

I'm considering getting one and a nice big monitor or TV. It needs to run x-plane 12 at decent speeds and maybe support a bit of light gaming. My macbook M1 pro is actually pretty decent for this but the screen is too small for me to easily read the instruments. I expect this will do better even in the base setup.

Otherwise my needs are pretty modest. I'd love to see steam add some emulation support for these things as I have some older games that I enjoy playing. I currently play those on a crappy old intel laptop running linux. I've also been eyeing a new AMD mini PC with the latest amd stuff (Beelink's SER9).

Seems pretty nice as well and seems like it is more performance for the money. Apple is doing its usual thing of charging you hundreds of euros for 50 euro upgrades. Get the base mac studio instead. It probably makes more sense if you are going down that path.