(Originally posted as a reply to a dead comment) While there was some controversy regarding how COVID spreads in the early days (droplets vs aerosol, how many virions you needed to be exposed to to become infected, whether asymptomatic transmission was possible, etc.), most of the details were fairly well understood within a year after the pandemic started. Plus, we were already aware that coronaviruses are capable o…
True right now, but what happens if it mutates? A few thousand is nowhere close to pandemic but it's enough to give the virus many opportunities to evolve against its new environment. On the plus side, most viruses become less deadly as they adapt to their host. COVID luckily did this, it seems. If Ebola does this it'll become like the flu, but we don't want yet another flu-level disease circulating.
There are more than a dozen viruses in the same family as Ebola, each of which have various strains, and none of them have airborne spread. Also, this family has been around for over 1k years [0], and any mutation allowing for airborne spread would be heavily selected for, which suggests that it's probably not "easy" (in the sense that it would only require a very small number of mutations) for the virus to acquire this trait.
That being said, evolution is messy and probabilistic, so it's certainly possible for this to happen (especially considering the high AIDS prevalence in Africa, which increases the risk of recombination), but the odds of this are so low that I wouldn't worry about it. Another novel coronavirus or influenza strain would probably be my biggest worry.