Id say more its in the Perpertal Beta https://en.wikipedia.org/wiki/Perpetual_beta stage, they have locked down the basics of the game and realsed those into Beta, and are slowly working on bring across feateurs as they can, its been a prety common thing for years now. . even KSP was stuck in that for years, remember when KSP was free but the parts phsyics did this?
Or landing legs could rip a craft in half? Hell I exploted thqat bug back when stage seprators weiged so much that removeing one from your craft cut your DV requiremnts significantly for a return trip from that brand newly added Mun?
PB or EA has been a ever growing thing, hell loook at the full realse hell major titles are going though.
Prettry much every game Ive paid for and played in the last 10 years out side of a handfull of major AAA ones like Diablo, Doom etc have all been some PB or EA, and ive enjoyued palying them and exloring the new feteurs as they came out, things are changing, its not the 80's or 90's or even the 2010's any more.