Well, I guess based upon most of the above comments that I'm in the minority when I say, "I love 1X bikes!".
I have a 2x10 SRAM setup on my 2013 Whyte 129 full suss 29er, 1x11 on my 2016 GT Grade Gravel bike (an upgrade to GRX 810 drive chain from the stock 105 double) and 1x on my 1996 GT bravado resto mod gravel bike (middleburn and Shimano Deore 10 speed with clutch). I've also had dozens of bikes with 3x over the years.
I can say hand on heart that when riding either of the 1x, I never think to myself "I wish I had more ratios". Like one of the previous posters said, if the hill is too steep, I change to an easier gear, if I'm flying downhill and spin out the pedals (rare on any bike these days, too scared of crashing) then I freewheel and have a little rest.
My 1x bikes are easier to set up, look cleaner/simpler and have fewer parts to adjust/break/replace. The chain line can look a bit stretched at the extremes of the cassette on the GRX setup, but I do a couple of thousand miles a year on this bike (as it suits the terrain where I live) and I can honestly say I don't think I am wearing out chains any faster than on a 3x set up. A much bigger factor in chain wear for me seems to be keeping the drive chain clean and freshly lubed. Where I live hills that require the biggest cog at the rear are few and far between, so the occasional use doesn't equal massive chain wear.
It does amuse me that some people get so animated about this subject - nobody is forcing anybody else to choose a particular setup, so just use what works for you!