Meh, if just wanting a lightweight laptop that’s fast even when unplugged there’s people who would be OK paying $700 for a M1 MBAir or a bit more for a 16GB version. They’re great laptops, the Rust compiler is very fast on M1/2 and with no fan noise. If buying Apple Refurbished they’re like new.
I’ve been using OSMC on two of my TVs for years. First on RPis, then on Vero boxes. They connect via SMB to my NAS for content. OSMC/Kodi can play almost anything without needing wasteful transcoding. I use them daily.
For Netflix/Prime it’s either built in on the TV or running on a Firestick. Interestingly one can sideload Kodi on a Firestick, so an OSMC device isn’t necessary in that scenario.