If the aircraft you are referring to is a 152 then if it were not for the US liability problem killing most certified aircraft manufacture for 30+ years it would have been superseded (and scraped) long ago.
I know "everybody" has bought this "liability" and "certification cost" argument from various US firms, especially Cessna, but it is basically bogus.
Especially the certification cost one, which has been totally debunked by so many small players who got FAA and EASA certification (for simple planes).
What really happened is that almost nobody was buying the Cesspits (or almost any other old iron). The GA industry went through many years of a deep depression, and the liability argument was just a handy cover for slimming down, and while we are at it, let's cut down our future liability as well....
Cessna, with its massive resources, could easily bring out a new C152 if they wanted to, but they have evidently (Cessna is the least stupid company in GA) determined that the market for a
152 lookalike would be too small. But they prefer to not say that, for corporate image reasons.