In my career i have seen prod servers even running on Solaris 11 which was released 10 years ago and has no support now.
This usually depends, whether the underlying dependencies required by your application change/requires to be updated frequently or not,
If yes - Go with supported version.( which will also run out of support :D )
If No - Stay where you are. ( Best choice Mostly )
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…