The main concern is for chats and abuse. Someone could say something rule-breaking and then edit it out - the offensive must be appropriately captured. And keeping every single revision of your post seems wasteful. The current system stores the original post, so there is a way to keep track of infractions.
Ok, let's examine the goals here:
- Provide a good roleplaying platform where people can enjoy their roleplays.
- Capture abuse when it happens.
- Not be wasteful.
We find it useful as roleplayers to be able to edit and improve our posts, and one and only one edit makes that tricky, unless we want to dive into an edit process, when the goal is to just get on with the roleplay and have fun. (Being able to switch into edit mode isn't a consolation, it requires extra hoop-jumping from something that expected as a basic always-available feature on similar systems.)
Solara claims to never have seen this abuse happen in the first place. My own experience with RP forums is the same. I've also never heard of it happening on here in the year or more the site's been alive, and that's plenty of time for people to have done plenty of it, and they can do it, because they can edit a post once. That makes this a thing that will happen either never, or so rarely there's not even a reputation for it ever happening in this system or other systems. Someone just being a regular jerk who turns you off and makes you regret playing with them is more common.
So, this is a fundamental piece of utility we don't get because a risk of abuse that has a probability of occurring somewhere beneath negligible and nearly at nonexistent. That's a "this is why we can't have nice things" where the "why" doesn't even demonstrably exist! That's frustrating to be told as a user who just wants to maintain a quality roleplay that's enjoyable for my partner.
I can understand the technical concern of storing every version of a post. There's technical workarounds like just calculating a diff if space is a concern. We're unlikely to see more than a single digit number of edits for most posts except, maybe, a main/setting post - most of us will do just fine with a second and third edit being available except in exceptional circumstances, to fix up errors that creep in after our edits, and then the other errors we didn't notice.