I love to use macOS mail app, it works great from the point of view of a desktop app, it looks and behave as intended but is definitively not perfect. There are some features that would make it perfect.
I tried spark a while ago, when it was just for Gmail, I didn’t like it and never used, then falles in love with CloudMagic until they decided to super rise the price.
I started to use AirMail, was promising until today that I wanted to share an image via email and AirMail wasn’t there in the share activities. Then installed Spark and here we are, sending this from spark.