It depends on the application. VTOL jets are literally death traps for human pilots, no need to risk human pilots life and limb for that capability...however a smaller (in the 5-10 ton range) but capable VTOL UAV/UCAV aircraft seems feasible and reasonable.
Except in that range we are talking about Yak-130 type aircraft that will be 15-20 million dollars each... they already have plenty of helicopters that can take off vertically and UAVs that have the potential for much better performance.
Making a platform vertical take off or vertical landing (without parachutes) is just making that aircraft fragile... to take off vertically it needs a high power to weight ratio... which means a big engine or engines and as light a structure as you can make it... you know... fragile.
The big engine in a light aircraft means it will have good acceleration and speed but poor range and payload because extra payload means more power from the engine and less weight in the structure... which means weak structure... not only fragile but not likely to last a very long time or serious use...
Like it or not, the most likely standard Russian VTOL fighter is the Ka-52K... and improvements in high speed helicopter technology should allow rather a useful little fighter to be developed that can be carried by most Russian ships... which is rather more than can be said for the F-35 type aircraft which will never be able to land on Russian corvettes or frigates etc.
Scramjet powered AAMs with decent solid rocket boosters should allow rather good air to air target engagement performance anyway... even from lower flight speeds and lower flight altitudes...