I'm a Campy only guy and Campy has been first with 10, 11 and 12 speed road bikes, so it's easier to keep up. If you buy a 2020 Shimano 11 speed bike, it will be old news next year. I got two 2020 Campy Chorus groups last July when they first became available. I paid significantly less than an 11 speed Chorus group, I bought in 2018.
Unless a new group offers a major change, I wouldn't worry about having the latest. Changing from 11 to 12 was a big deal for me, because I really needed the new 48/32 crank and 11-34 cassette for the mountains that I ride. SRAM AXS costs twice as much and has less low gear and poor spacing with their 46/33 and 10-33. A 44/31 crank would be needed to match my gearing range and the spacing of sprockets would still be less desirable. No thanks.