Beats having to maintain bug compatibility to keep popular proprietary code running though
Re:Microsoft's Three Browsers
by WorldMaker on Tuesday February 04, 2020 @12:44PM
(#22238528)
Though at least when Microsoft was doing that they were documenting those bugs and bringing them all to web platform standards boards for review. Now they are more likely to contribute such bugs to the web platform again without documenting them, leaving probably poor Mozilla the only ones left to notice.
[1] Arguably a success case in some viewpoints; it's sometimes why people promote open source.