Ineos have their replacement already for Kiryienka. Triathlete Cameron Wurf (former pro at Cannondale) is added to their roster: https://www.uci.org/road/teams/TeamMemberDetails?memberId=57762
(trying to say this nice now)
I know CF is real professional athlete, but he ain't never never ever going to step in those boots. Never. There are really hard superdomestiques in pro cycling that are way above Wurf and they are way below Kiryienka. Thats just the way it is. Of course clock is ticking for Kiri, but Wurf is not a replacement for him.
Dennis may be the one.