So, "do a whole lot of sidequests, including a few specific ones" was basically how you get the true ending in Nine Sols as well, I won't deny that. But the stuff for Shuanshuan and the poisons to trade for heart containers with Shennong were a lot easier to track down, and maybe I'm just bad at this sort of thing, but I didn't even know Sands of Karak was a place I could go until I looked up the list of Shakra's maps. And while I have been doing a lot of sidequests, the requirement to check back that frequently at Bellhart's Wishwall to avoid missing the start of 'Trail's End' or 'Silk and Soul', as far as I can tell without any other indication that they need to be revisited after those points, is a lot more difficult to intuit than going back to the Pavilion of Four Seasons to check on Shuanshuan and Kuafu after escaping Eigong's Soulscape. You pretty much have to either be obsessively crawling over every inch of the game repeatedly in search of more percentage points or have a guide to find this stuff, as far as I can tell.
I don't know. I am still going to do it, now that I've looked up what I need to do it feels a little late to back out, but it's kinda soured me on the game. Symphony of the Night just needs you to poke around more for the two rings, I didn't even know that I'd done anything different for Nine Sols, and Hollow Knight's true ending could probably be gotten by intuition alone by people who found Kingdom's Edge more easily than I did, but I can't help but feel as though the development process of Silksong led Team Cherry to more than a little bit of complexity addiction, to the game's detriment. I am still having fun, though, so there's that.