Sort by sender is a great way to quickly sift through emails…especially those that are marketing, or other daily sends that you don’t normally get to in a timely fashion.
Thunderbird has this feature; it helps me get through hundreds if not thousands of unread marketing and update emails that don’t necessarily need to go go trash immediately, and need to be quickly perused.
I will soon be leaving Mailspring, as I see this has been a feature request for over 3 years, and has not been implemented… neither has the gmail sort by category feature… overall I’m unclear as to the value add of using Mailspring compared to me just having Opera or Brave be my mail client via gmail.