Blog Post Somewhat rambly, mostly because I'm tired and I've typed this up at the last moment. The general tl;dr is that if you're someone who never wants to use this, your experience won't change. If you are then you're in luck!
It's going to be an interesting feature, and more developed than just "Enable autohop, hold space forever". The discussion thread was helpful in deciding how we'd add the final product, so thanks to everyone that contributed. Ultimately this is a low impact version of autohop; you can't prespeed with it, and it's just for those areas that catch newer players out and might deter them, such as lemon/lime. I expect the vast majority won't use or acknowledge this feature, it's for those who need a bit of help (or aren't interested in setting times).