The question could be changed to: “what’s your favorite programming language?”
I would said that this is a subjective question, as everyone has different opinions in expressiveness and design, and the productivity also depends in your experience.
On my case, this language would be Ruby, as that’s where I feel at home.
I had a sheevaplug or something like that (I can’t remember the exact name, but it was around 2010). That thing was hot and it actually stopped too much times. Then the raspberry pi 1 (the original). Too slow. I’ve upgraded to a Raspberry Pi 3, that I used a couple of times as a desktop when my laptop broke. That wasn’t fun, it was slow too. During COVID I sold that and bought a Pi 4 from an authorized seller, so it was the official price. I bought an SSD and an Argon One case. The fan broke after a few month of usage, so I sold the whole thing. Finally I went to eBay and bought a Dell Optiplex Micro. That thing is the best. Used as a desktop, also as a server. It’s fast, smallish (not that small as a RPi, but it’s close. It can go to a backpack), and upgradable. It can have two monitors, two ram sticks, an SSD Nvme and also an SSD SATA. It’s a little beast.