Will they have AIP? I would certainly think so, the russian navy has been 20 years behind with this...
Like in every field where things are not going super fast... they are having problems because what they are trying to do is brand new and ground breaking... if speed of production was the most important thing they could have an all new fleet of brand new ships and subs that would not look out of place in 1985.
The AIP they are developing uses diesel fuel as the catalyst.
Big deal you say.
Well actually it is a huge deal.
First of all it generates more power than your average hydrogen power cell.
Second one of the biggest problems with introducing a new technology is the cost of upgrading the infrastructure everywhere it will operate...
Having a super new hydrogen fuel cell technology would be nice but the cost of upgrading all the Russian ports to allow them to actually use the technology is not so flash... not to mention most ports around the world wont have such facilities either so most of the time it will operate without its AIP actually working or will have to work out a way of delivering fuel at sea... a new capability that is not the same as delivering fossil based fuels.
Just the same as developing the super new Zircon hypersonic missile... if they had done it in the 1980s it would not have been that much of a big deal because it would take a while for them to make enough new ships able to carry it.
Today however with an AIP that uses diesel they can operate from pretty much most current domestic and international ports.
Equally with UKSK launchers once the Zircon is in service it can be widely deployed immediately.
The problem for the Russian Navy is that they have two new driving design paradymes... modularity, which should allow for the full standardisation of their new and upgraded ships and subs, and multirole, which means instead of building 15 anti ship destroyers and 15 anti sub destroyers, they can make 25 vessels able to perform either or both roles... roles they can change when it comes time to load the UKSK bins.