I can't stand the web and websites without ublock origin. it would be a wild jungle full of annoying, malicious ads, miners and so on. If Microsoft Edge cause conflicts for ublock origin due to some manifest BS, I will switch to Brave browser or Firefox.
There is no way Edge is going to reach 2nd place simply from uBlock Origin users. Not all of those are going to switch, not all who switch are going to switch to the same browser, and in any case, uBlock Origin has "only" 10+ million users, according to the Chrome Web Store listing: https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm This said, I agree that Microsoft should take a good look at the Manifest V3 controversy and at the very least take into consideration deviating from Google's line of action. As it seems, they wouldn't be alone with that either, as Brave and Vivaldi have announced to do so and Opera seems to be considering it. It seems Microsoft would be in good company, but I can think of some reasons why they may choose to follow Google anyway, e.g. they may feel it could hurt their relationship with Google, or they may think it's not worth the trouble and investment for the relatively small number of users who care about this (of which a higher-than-average number probably use Linux and mistrust Microsoft anyway). We'll see.
Those who mistrust Microsoft, they use linux for desktop os, okay fine, what about mobile and tablet? Android and IOS both gather extensive data out of their users. the only way to stay totally off the grid is to disconnect the Internet and live in the basement with a tinfoil hat. even after 30 years, Linux still isn't ready for normal end users to use it. lots of hardware and software compatibility problems.