Well it is limited to their wallet. I am updating a 4.8 wallet right now, and all seems fast and normal. However I am only doing this because my trusty 4.6 I had been using stopped working out of nowhere

"exiting Siad" "Code 0" error ...has a few coins in it, so I am hopping to transfer the wallet json and pick back up those coins.
In those cases, it is worthwhile checking what siad returns on the command line. I've seen EOF errors due to renter issues. Anyway, you better stay with the most current version for less bugs, more bells'n'whistles. PS: Don't forget to back up your wallets. Its just a text file and you just need to do it once.