TeX, especially with the MicroType package, still produces the highest-quality machine typesetting available to mortal man (eg. people who are not employed by Random House or something). Any effort to replace TeX with some other tech stack probably ought to replicate this typesetting quality, which is going to be _really hard_. Smart people spent a long time getting TeX output where it is today, and replicating that won't happen overnight with a switch to HTML. Those (few) of us who care about this sort of thing are consequently unlikely to take the bait of the new system.
Well, you have to use LuaTeX, though. Knuths TeX has various shortcomings like "cannot use ttf fonts" and "poor Unicode support". However, some packages might not be adapted to LuaTeX, yet.
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TeX, especially with the MicroType package, still produces the highest-quality machine typesetting available to mortal man (eg. people who are not employed by Random House or something). Any effort to replace TeX with some other tech stack probably ought to replicate this typesetting quality, which is going to be _really hard_. Smart people spent a long time getting TeX output where it is today, and replicating that won't happen overnight with a switch to HTML. Those (few) of us who care about this sort of thing are consequently unlikely to take the bait of the new system.
Well, you have to use LuaTeX, though. Knuths TeX has various shortcomings like "cannot use ttf fonts" and "poor Unicode support". However, some packages might not be adapted to LuaTeX, yet.