Miterclip and Arcs joins, and the future of SVG 2 generally

A while back I implemented Miterclip and Arcs joins in FontForge because 
I thought they were a good idea (and I didn't realize at first that they 
weren't implemented much of anywhere else).

And because I thought they were a good idea, and I was familiar with the 
algorithms, I decided to try to get them off the "at risk" list by 
implementing them in Skia and then a browser. Hence, after a large 
amount of work:

https://skia-review.googlesource.com/c/skia/+/303483

It's very hard to defend code quality in words but anyone who wants to 
(and has a machine capable of compiling Skia) can pull this over and run 
viewer --slide StrokeJoins to verify the general lack of "glitches" for 
themselves.

I've now chatted briefly with some of the Skia folks and they say it's 
unlikely they'll review this CR, let alone integrate it, for the 
expected "this isn't coming from the product side" reasons. Code quality 
is therefore not at issue -- it's just an issue of perceived demand.

So, two things:

 1. If anyone is in a position to prompt advocacy for this feature from
    any group maintaining a browser that uses Skia, now is the time.
    Opera, maybe? Anyone?
 2. If no one is in that position it may be time to rethink this part of
    the standard.

Obviously no one asked me to do this work so the time that I've wasted 
is entirely on me. However, if this is the reality there's a point where 
standards groups need to ask themselves whether what they've specified 
amounts to more than an attractive nuisance (like a pool without a fence).

Skef Iterum