I'm pretty sure it is fairly rare nowadays. I'm just lucky that I still have the copy from my childhood (though at the moment, my brother is borrowing it). It wasn't among the most known games. I'd consider it a hidden gem on the Genesis.
Last retro game I played was, unsurprisingly, EarthBound. I'm doing a 1/128 item run. Because I'm doing that challenge and since I can save my game, it's pretty perfect for popping into my SupaBoy during my long commute if I don't feel like reading, listening to a podcast or music or just chilling.