Steam's system survey shows Linux desktop usage at ~0.85% and general consumer surveys show less than 3% usage even after thirty years of development and that is in spite the fact that it costs nothing. Moreover, a $45 Raspberry Pi 4 costing a third as much will have vastly better performance as a desktop than any logic it's possible to fit on the DE10 board costing $150 that was mentioned. The examples provided therefore demonstrate the exact opposite of the points you are trying to make.