I do with that #Microsoft would sponsor/develop tighter integration (more open extensive API) between #Office365 #Outlook/Calendar/ToDo/Groups/#Teams and external clients.
#Thunderbird with #TbSync only goes so far. (Even meeting support is not 100%, AFAICT)
I do not want to log on through the browser *just* to like an email, and avoid sending unnecessary emails...
I believe that if you give people the freedom on how to interact with you, they may be more willing to interact.