Both pow and pos have serious flaws. Neither is immune.
Bitcoin is PoW and still alive for longer than 4 years without major flaw.
there is major flaws with pow. It's like cars... We have cars that are majorly adopted but they are run on petrol which is a major flaw in the concept of cars due the inefficiency of the engines and fuel source for the engine. Everyone knows electric cars are more efficient and solve the major flaw previously mentioned how ever they are only a fraction of the total automotive industry and not very popular regardless of being superior technology because the infrastructure isn't in place to allow mass adoption.
Not only that but people won't actually try the technology because they are complacent with what they already use because in their eyes it is "good enough" and will not realise the deficiencies in what they currently use until the later more advanced and efficient technology becomes further adopted at which point they are part of the mainstream adoption and missed the "early adopter" status of that technology.
There will always be people who deny that the more efficient and advanced technology is better and fight against it due to vested interest which is what we see today with those who have a vested interest in bitcoin and those who have a public persona in the btc space.
The same concept can be applied very well to 1st and second gen crypto..
Just because bitcoin is fully functional and gaining huge adoption, it doesn't mean it's the superior technology.. Eventually infrastructure will be built for the superior tech and people will start to see the it is superior and it will gain adoption...
The question is... At what point will people see this and move from old inefficient tech to the New more efficient and advanced tech? And where in this adoption curve do you fit in?
POS has everything to prove while POW has nothing to prove at this point. Bitcoin's been at it for over 5.5 yrs w/o a significant protocol incident. certainly not one that's hurt it. that's a helluva long time. if gubmint were to attempt to attack it, they should've done it years ago. now, it's out of reach and still accelerating to the upside. sure, you can worry about it all you want and present all sorts of counter arguments, but the fact is, there has never been a major protocol hack and the price is up tens of thousand of percent.
life is full of doom sayers and pump and dumpers. some ppl just can't accept the truth even after it's stared them in the face for years.