I currently use Spark Email as my primary email application. One of my favorite features they have is the ability to mass-archive emails under the "newsletters" or "notifications" category sections. Honestly, I haven't fully switched to Proton yet, mainly because their web and native iOS app are harder to use than Spark. If Proton added more features Spark has built into its app, or partnered with Spark to provide a secure way to integrate my Proton account into the Spark App, I would 100% make the switch.