My only experience working for a company that ran Lotus Notes was in the mid-90s. The company ran on Lotus Notes. All the back office processes done today mostly through internal or SaaS apps was done then using Lotus Notes apps. Expense reports, benefit selection, procurement requests, travel requests, etc were all done using Lotus Notes apps. This is a time when 90%+ of companies still did all this using paper, fax machines and interoffice mail. As a field employee this made my life much easier than my peers at other companies.

Knowledge bases, installation files, patches, etc for all the products we supported were also maintained in Notes databases. Once a day I would sync the latest updates down to my laptop. I then had a searchable knowledge base and all the files I needed for my work without having to be connected. Back then being connected when mobile was the exception and not the rule.

Lotus Notes was a god send for me in that job.