A Mac Mini can run more software than any of their competitors (you can’t install macOS on a VM on a Windows or Linux host but the reverse is possible).
Even on the hardware side you are free to connect third party drives, monitors, keyboards, etc…
My point mostly was that if you buy a Mac Mini, you aren’t really trapped.
And where do you plug in the extra RAM?
My HTPC is about 12 years old, and I'm pretty sure that the internal SATA SSDs are slower than a modern external USB3.1 drive. Yet it does everything I ask of it with no noticeable delay.
No, the thread is not mentioning HTPCS but about NUCs, which can also be used to do productivity work/games, not just watching movies, so exqueeze me that I want/need a system with 16GB of RAM and some decent storage in mid-2023 to be productive and am not contempt with the bare minimums of 8GB/256 and being price gouged for any drop over that.
Meanwhile a 12th-Gen NUC with 16GB RAM and 500GB SSD costs ~$240 on Amazon, and you can replace the internal RAM and SSD with whatever size and models you want.