by Jesus Federico.
Have you even tried the plugins on your deployment?
There are no architectural changes from 2.3 to 2.4 and the API's didn't change either, so, there is no reason why the plugins that where extensively tested on 2.3 would not work on 2.4. I am pretty sure the most of the plugins already updated for 2.3 work well on 2.4.
On the other hand, 2.4 stable has been out there only few days. You should not expect the migration of hundreds of non-core contributed modules tested, updated and re-certified in one week. At least no for free.