I've been working on a client's website that uses a lot of citations and runs 1.19. After a bit of profiling over the last few days, the use of some of Wikipedia's templates stood out. I decided to try and backport Scribunto to 1.19 to see if that would help.
After writing a couple of shims -- mostly for ContentHandler that 1.19 doesn't have -- I have the Infobox template successfully working. I'll have time to try others later, but I'm pleased with this small success.
Would anyone mind horribly if I branched Scribunto for 1.19 and committed my changes there? I'm well aware that future work on Scribunto will continue without any consideration for 1.19's capabilities.
Mark.