From what I can tell that is the only time in history anyone ever used that phrase aside from everyone afterward being confused about what the hell it means
It's because low level in terms of software engineering is like the foundation of a building, while high level in terms of the skill required to do something is like the top of a podium.
Use Firefox. If something you use ABSOLUTELY needs Chromium yell at whoever makes the thing. If that still doesn't work use Brave. But then go back to Firefox for everything else.
Was just a dopey idea in the first place. Nobody replaces a mouse because it's lacking software features, they replace a mouse when the switches wear out.
Out of curiosity, do you know if these containers also obfuscate browser and device fingerprinting? Separating cookies is important but unless it also blocks fingerprinters (in a different way for each container) the site will instantly know the same person is using both accounts.
I tried kagi for a month and the results were probably as good or slightly better than Google for 90% of searches but it completely falls apart any time you want something local or hyper-specific. It made me realize that the personalization that people hate with Google's results actually saves a ton of time because I had to retry a lot of kagi searches with additional context.
Blocking ads and trackers in your browser and then using Google without an account will get you most of the way to what kagi is doing.
"Look up what this is later"