One of the recent (awesome) trends on the mountain biking side of things is 1x12 drivetrains. My Rocky Mountain has a 10-51 on the rear and I have a 30-34 Oval ring up front (One-Up Components). I can climb anything! But there's an awesome side effect of drive trains like this, they're really noob friendly. I used to sit in the top three gears when going uphill, but now the 51 tooth is reserved for climbing walls as…
Campy coming in with the 1x13! https://www.campagnolo.com/UK/en/ekar/1x13
That's crazy haha. In an interview with sram engineers, they said the real limit with 1x drivetrains is the amount the chain has to bend when in the outermost positions. If be pretty cool if they could figure out how to deflect the chainring and align it correctly