Greater file size capacity for sending emails
I can only send 3-5 photos maximum per email; for somebody who wants to share photos via email, this is completely unfeasible. A much larger attachment capacity seems greatly needed.
The limit should not be increased, but there could be an option to share larger files via a ProtonDrive link in the email.
I think this a limitation of email in general, not Proton mail
Isn't this one of the uses for ProtonDrive? I wouldn't cry about larger options, even in paid tiers. But I don't think it's required. Linking pictures from ProtonDrive is the better way.
25 MB per email is plenty, and many email providers will reject larger emails. maybe resize your pictures before sending them, the recipient probably doesn't need 100 megapixel photos to print on a billboard.