I volunteer for a large environmental organisation. We use Mattermost extensively to connect to our supporters.
However, we feel very hypocritical when we have to tell an environmental activist they have to throw away a perfectly good piece of technology (eg an older iPhone) and buy a new one just to connect with us.
Is it not possible to keep old version of the apps for older phones in the app stores?
Also, why drop support for older browsers, why not just degrade gracefully to a slightly less whizzy UI?