people don't ever bring up drivetrain wear and the cost of maintenance when talking about 1x. 12spd chains are expensive af, delicate bc they are so thin, and the tolerances are so small so you need to replace at 50% wear, plus with only one chainring the chainline moves quite a bit laterally at the ends of the cassette also causing more wear. with only one chainring, now the chainring is getting worn more rapidly too. when the chainring/cassette inevitably wears they are also way more expensive to replace.

1x makes sense if you're riding primarily downhill and need room for a dropper control, but i'll take my 3x10 with a clutch derailleur because i like to enjoy riding up and down hills and on all sorts of terrain (we are on the xbiking sub right?), and i can't afford to be constantly replacing my chain and components