I used Lotus Notes until 2022, in a British blue-chip company. Stopped because I left that company - I am almost certain they're still using it, because they weren't close to migrating off the last few use cases.

It was universally hated because it felt so clunky and old-fashioned, but it was being used for ERP-type applications with a lot of business process logic that had developed over time. I found it interesting that you could click through the interface and find a lot of capabilities that were vestigial, still present but unused because they were made obsolete by web apps.

I just searched and I see that it was rebranded HCL Notes in 2019. I don't remember that branding at all. It seems likely we were stuck on an obsolete, non-rebranded version, deployed on local servers.