My first exposure to Lotus Notes was to work on a migration project that was moving from Notes to "Exchange WebStorage System" (WebDAV) - which was an aborted "go-nowhere" server/service which ended-up being replaced by SharePoint ("Teams Services") - which we had to also re-target mid-project. We faced a situation where we had about 4,000 custom Notes apps to migrate, a small team and an extremely limited time. (and…
Notes and Sametime also worked very well on Linux on my IBM work laptop, supported by support, official Linux distro inside IBM. That was mid-late 2000's when many companies hadn't even thought of trying to support both Windows and Linux (or Mac).