To add to @unknown_error’s valid points, we’ve seen before a difficulty in a community which has a proportion of older people who are using older iPads - possibly in an institutional setting, probably in a cost-constrained setting, where they are taking presumably acceptable risks, hopefully not attempting banking or other high-value activities, and are being disenfranchised when older browsers become unsupported.
I welcome any and all efforts to keep the forum functionality working for such cases, even if the presentation is not so slick.
My understanding of the culture in the Discourse team is that the software will always be moving aggressively forward - it’s not a consolidating or conserving kind of organisation, for better or worse. Hopefully it can show itself to be a caring culture: it’s the less fortunate who are running older browsers, for whatever set of reasons.