In general, you will pay less fees with recent wallet formats.
If you encounter a bug, though, please upgrade, before you request support.
For developers, there is nothing more irritating than users who are complaining about bugs that have been fixed a year ago.
It feels like being said: "I don't give a shit about your work".
thanks for your reply Thomas, i mostly meant this as my cold storage, it is a bit more work to upgrade it and a bit stressful sometimes. and since i rarely use the cold storage i'd rather postpone upgrading as long as possible.
but yeah i see what you maen, i always search if i encounter a bug to see if there was a solution, then i make the back-ups and then upgrade,... and then ask if it wasn't still fixed.