Spraying with compressed air as instructed fixed my 2018 model's E key temporarily, yet lodged debris under my space bar, causing the right side to lose all clickiness. No amount of compressed air could get it to work again, so I brought it in and Apple replaced the keyboard (free under Applecare, otherwise $290).

I don't trust that it won't break again, so I switched to Linux on a Thinkpad (and all the hassle that entails) after 14 years of using Apple laptops.