I prefer a 2x. If I wasn't worried about top end speed, I'd be just happy with 1x. I've got a few 1x11 and 1x12 MTBs, so I do appreciate a good 1x set up. However, I'm frequently using both ends of the spectrum on my gravel bike...lots of extended climbing, but also some road descents that I'd spin out on most 1x set ups. I'm running a 48/31 and an 11-40 rear cassette with the GRX 810 derailleur. It gives me decent climbing gears, but still retains the top end of the stock bike.