I had a client (a national company with multiple locations and call centers!) that was using Lotus Notes for email in 2022, and for all I know they could still

I had a client (a national company with multiple locations and call centers!) that was using Lotus Notes for email in 2022, and for all I know they could still be using it. They had to run parallel calendars to work with external event invites, and apparently one of the calendars was backed by a system with a clock that was 5 minutes off because everyone was always getting to virtual meetings at the wrong time.