Except ChromeOS and webOS are both based on linux, which is written in normal, fast C.
The computer on my desk cost about $3000. If all my programs ran twice as slow, thats sort of like removing $1500 of my computer away. Could I get away with a $1500 computer? Probably. But I'm not going to be happy about it.
If you are happy to pay the cost of a garbage collector, why C at all and not Java, C#, Go, Typescript, or any of the other fine options? They’re simpler languages with better tooling and cleaner syntax. I understand Fil-C for running legacy code. But for new code, the only reason I’d ever pick C is performance and Fil-C takes that benefit away.
For legacy code that no one is going to rewrite, of course.
For new code, I would go further than that, first of all languages can have a GC and have C like performance, it is a matter of implementation, algorithms, data structures and design application with mechanical affinity in mind.
I would go for what the last OS designed by UNIX and C authors, C only gets to be used in the kernel, and some more low level drivers, everything else is managed, like Inferno and Limbo.
Many fail to realise that UNIX and C authors moved on from their original creations, improving what they saw as flaws.
The computer on my desk cost about $3000. If all my programs ran twice as slow, thats sort of like removing $1500 of my computer away. Could I get away with a $1500 computer? Probably. But I'm not going to be happy about it.