Author here, the idea with the title was that Lotus Notes was built at a time when the standards for email especially but also interfaces and keyboard shortcuts were still in flux, and it was built for so many platforms at the same time, all of which contributed to many of the complaints about its interface seeming like a mess. It was starting from scratch with opinionated takes about how the software should work, and that’s a tough spot to build in (and which partly accounts for both the fond and bad memories that both typically surface whenever Lotus Notes is mentioned).