@wild1145@mastodonapp.uk that's completely fair. I can certainly understand the risk in suggesting an instance whose uptime and longevity you cannot guarantee.
FWIW I am a developer working on ActivityPub integration in NodeBB, a forum software. I am active in AP development circles and am committed to ensuring the properties I host stick around. The differentiator with us is that you can get more of that medicine-focused feel due to our focus on local categories/feeds, while maintaining the global fediverse connection. 🙂