The former maintainer published a video summary every month on YouTube about SerenityOS progress. And now it seems that anyone does it

Is there any evidence of a DOS version?

I am using Goawk with good results

OT: I liked SerenityOS monthly development video, too. Are they gone, now?

Can we run Windows 3.1 in protected mode from a PDF?

Imho, it's possible. Generally speaking, it depends if PDF can render any sort of canvas.

Can we compile qemu to a PDF?

It's PDFs all the way down.

Can it run on a MS-DOS machine with 640 KB of RAM?

I miss those times. Every IDE had a line by line debugger. Now those Angular/React applications, even after years, do not have one; and they still have a confusing syntax.

I hadn't thought about it like this, but you're right. React has decent browser plug-in tools, but it is still painful to get things back to the IDE.

My experience with IntelliJ + a bunch of JS frameworks is that IDE-based browser debugging works quite well. Unfortunately, Firefox' remote debugging capabilities broke for me at some point, but adding a Chromium debug target in my IDE seems to work most of the time. As long as the Rube Goldberg machine that does JS transpilation includes a source map, frameworks just seem to work out of the box (as does raw JS, but that's not so common anymore).

That even includes debugging some languages compiled to WASM, like C#, interestingly enough.

What is written and what is actually running is so different that it’s better to think of SPAs as a different language. Firefox have a decent debugger for javascript which works well when the build tool output sourcemaps.

It's written in the website. Read the 3rd paragraph for all information you need.

Does it support wayland?

Can it run GEOS in a GEOS window?