Last month, Mozilla was still saying Firefox ESR would support flash until the 3rd Qtr of 2021, and we were working towards that timescale (it's been removed now), and absolutely no one at Adobe, had ever mentioned that Flash would be time-bombed, just that Adobe would stop supporting Flash, and that the latest browsers would drop support... (imagine if MS timebombed Windows 95, or Mozilla timebombed firefox 56.0 jeez... )
What happened was Adobe did a deal for $$$... so that Samsung/Harman could take Flash away using a Timebomb, then offer to licence it back for what is frankly obscene amounts of Money. (As far as I'm aware, MS is also keeping it, but only available for $$$ Enterprise licences). And it would be most effective at earning revenue if the Timebomb was kept quiet, than lots of companies would get caught out, and Harmon would make a tidy little earner.
We were up against it already following development work on the EU's Data Protection, then the UK's making tax digital, and then EU's Strong Customer Authentication, then Brexit customs/vat changes etc, then Covid-19 hit, and quite sensibly, the UK moved SCA enforcement back a few months to give us a breather...
Once I found out on the Adobe Flash forum late December that some enterprising soul had just tried putting his PC's clocks forward, and discovered Flash was timebombed, I prioritized the redevelopment of what is a tiny, but critical and horrible bit of remaining flash used on an internal network, but it was too late, our developers were to busy to fix it, it's hooked into some old legacy code which slow and difficult to fix. It will be done by the end of this month, meantime Adobe can do one, for foul business practices.
Something similar happened with Photobucket. What Samsung/Harmon and Adobe have done is not a million miles away from Ransomware...