You can choose. Personally, I am using 4.3 quite a time for now. Although, do not use both in the same time.
Please note, all your settings should be compatible between 42<->43 just fine, you can use your configs (like muxes, channels, etc.) from tvheadend42 to tvheadend43 just by copying correct ones to the correct new folder within userdata folder.
I can confirm it is in the addons now. Unfortunately, after turning off TVH42, TVH43 doesn’t work out of the box, it doesn’t get the old settings from the TVH42 installation. I had to go through the tool I wrote some time ago. Maybe it helps someone else as well to save a lot of time.
Although it may seem stupid, the tvheadend43 addon does not appear in amlogic-ng, nor is there any possibility to update addons or repositories (tested on x96air).
The 4.3 version has been there for a few days. I already had 4.2, I just disabled that, installed 4.3. Both versions work. I also have a 4.3 version on my synology.
Most problems with tvh, I put down to poor tv signal.
I found that with 43 there were 35 muxes got stuck in the scan que on repeated rescans. Some of those muxes were essential for my needs. Thats got to be a sensitivity issue but unacceptable for my needs.
The funny thing is that 43 is still way behind the current versions of TVH. Every release seems to introduce a whole raft of problems which is the reason why people stick to the tried and tested 4.2 version.
I found a problem with the muxes, Original Network id, it was 65536 so never scanned properly, I edited the muxes, put everything to auto, eventually the id changed to 9018.
I can’t remember the version this was a problem. UK Freeview