My understanding of the Tu-134 is such that the main dev actually died, and that’s why it wasn’t released. Perhaps I’m mistaken.
Overall there is another issue impacting some, in that Russian devs can’t exactly sell on the MSFS marketplace or any “western” site like Simmarket due to the financial sanctions against most Russian banks.
For other devs that may have background in Soviet aircraft (so, Ukrainians, Poles, etc) I think ROI concerns remain. More people are familiar with western fare than eastern, and that remains today, the iron curtain that fell in the early 90s still seems to propagate a block in awareness and interest in these aircraft, while current global events and politics aren’t helping with perceptions either.
Cockspur and other devs have every right to operate in silence, and I’ve seen other “Western” devs with an equally abhorrent attitude towards customers too. I understand the desire for a basic “is it on the agenda” answer though, especially as we have devs who “sit” on aircraft for years in an effort to dissuade others from making them.