For sure there is more users than instances. So the amount of requests would be grater but at least they wouldn’t happen at the same time.

But if fediverse ever grow to be as big as other social media, then a single post/link can be viewed by thousands of users at the same time causing the same effect.

If you really need it not to be killed, you can always open split screen before opening the second app, or just open it in free-form mode. But this is more of a workaround than solution.

Nothing wrong with it. It is just an alternative, for those who are more concerned about privacy and security than an average user.