Yeah, it's a clear abuse of market power and is holding back the web. They have the resources to fix these issues, and seemingly choose not to, effectively taxing developers, who pass the costs on the consumers. So even well within the current bullshit "consumer welfare" standard: options go down, costs go up, with Apple's apparent "embrace / hold up / extinguish" strategy.
I'd love it if you could write up your experiences, ideally with those figures on Safari usage and citations to any relevant WebKit bugs, and send them over to Rep. Cicilline's office in Rhode Island.
I thought his office did a good job putting together these questions on anticompetitive behavior by Apple (who has since actually been fixing the protectionist issues that they gave obviously flimsy answers on):
https://docs.house.gov/meetings/JU/JU05/20190716/109793/HHRG...
