That's encouraging news. Do you use a lot of sites with SSO? Are they mostly mainstream (where I would class MS Teams to fall in that bracket) or do they tend to be more niche services?

(I totally accept that my "50% of SSO systems will be broken by this" to be a worst-case random number i-have-no-idea-but-for-all-I-know value. Probably shouldn't have been so blasé about it! But very much interested to hear what real-world values look like)