[ivan_gammel]

>They also currently do not have engine replacements.

They demonstrated localized version of SSJ-100 with PD-8 engine in 2023. I'm not sure if it actually flew, but there were at least ground tests of the fully assembled aircraft.

[thriftwy]

Even if it's possible to retrofit existing fleet with PD-8, I can't imagine this happening at the rate at which the old (partly French-made) engines will be going out of order. So even that fleet will dwindle in numbers in the next years. Perhaps to zero, perhaps not - we'll see.