This is a question maybe @vanvugt can answer since he is a Mutter developer. I would like to know if this tool called sommelier could work on Ubuntu. Sommelier allows X11 applications to stay nice and crisp when using fractional scaling on Wayland. It does a very good job. Here are some examples from ChromeOS with 120% scaling on a 1080p display:
Those are all legacy X11 apps that scale very nicely on ChromeOS wayland. Since sommelier is open-source, do you think it could be implemented in Ubuntu?