I’m quite surprised that nobody asked for this before. I would love to see a OpenAI ChatGPT (Plus) integration in eM Client (via API key) that allows automatic drafting of emails, auto completion, text optimization etc. Technologically that shouldn’t be that far fetched and other companies/mail software will definitely roll out such features in the next weeks. Further functionalities could become more complicated but helpful, some examples for that would be automatic personalized replies (with rules), intelligent detection of duplicates, calendar automations (reschedule, free time assignments, …) or contacts management (auto completion of missing fields with Internet resources, unifying of contact details, …).
And while you’re at it, I would recommend to make that API integration universal. That would allow usage of tools like LanguageTool for spell checking as well.