>>5957 (OP)
I have 3 RPIs, two are the model 4B (or something) and one is model 5 (slightly more powerful). Currently I am using the 5 as a home server and am planning to start using it as a desktop if/when my current desktop dies. These computers can be used as regular desktop or server perfectly fine, except maybe for hardcore stuff (AAA games, 4K video editing, AI, ...). I made one of the 4Bs into a small off grid computer with a small GPIO display, all powered by a power bank. The advantage against a laptop is very low power consumption, it will last extremely long and as a server it will cost almost nothing on electricity bill. Laptop needs a wall plug and on battery will last something like 2 hours maybe. I've also had one RPI hooked to a big smart TV just so that I can browse Internet and do stuff without dealing with the crappy Android OS on the TV. Overall they are very cool, I can recommend.