The end of Warbirds?

This can't be anything but bad.
Flight Simulator and other chat
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https://forums.simviation.com/phpBB3/viewtopic.php?f=34&t=96579
older aircraft whose type certificate or supplemental type certificate is no longer supported by a manufacturer. Such aircraft are commonly referred to as "orphans."
What this will do for Technoavia (they are building a redesigned Yak-18 as the SM-2000P and a 750HP turboprop version of it that is fully aerobatic certified) i don't know.
Even GA types can be certified as Experimental...it just affects Fare-Paying Pax and insurance rates after all...besides allowing uncertified mechanics (like hobbyists) to work on the plane.