Damn! An here iam thinking iam the expert.

Well i stand corrected ! 

Hahaha.

I think you refering to gamerant and not me since thats my whole point ahahha,they trying so hard to defend sony and"justify" them going all digital because"look physical gamers your discs be dead soon!" 

When we all know thats NOT the case.

Yeah. Rewritable/recordable discs are known to not have nearly the longevity of a regular pressed disc like you find movies & music on. Barring any manufacturing defects, a standard CD, DVD, or Blu-ray will last many decades if you take care of it properly. I have CDs that are 30 years old and still play fine. I have DVDs going back to at least 2000 and they play fine. And while my oldest Blu-ray discs are 13 years old, they still play fine. Disc rot is a greatly exaggerated phenomenon, and it bugs me when people use cherry-picked examples like BD-R/BD-RW or bad pressings that were clearly defective as representative of the whole format.

Yeah to extend things beyond Blu Ray, I have CDs my parents bought in the 1980s that still work perfectly, and DVDs from the 90s.

Any other source than the Canadian Conservation Institute (CCI) estimates the average lifespan of (pressed) DVDs & Blu-rays around 50 years, even 80+ years if they are stored under optimal conditions. Good enough for me.

f.e. https://forschungsdaten-info.translate.goog/fdm-allgemein/speichern-und-rechnen/datenspeicherung-und-die-lebensdauer-von-datentraegern?_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=de&_x_tr_pto=wapp

This "forschungsdaten.info" site is hosted by the German university Konstanz (and supported by other German universities) and is funded by a German state ministry.

Of course there are always some bad apples (f. e. Warner Bros. used bad glue for their HD-DVDs in the 2000s) which stop working much sooner, but these are the exceptions, not the rule.

I have literally thousands of discs, CDs, DVDs, Blu-rays, 4K Blu-rays, PlayStation, Xbox and Nintendo discs. Some of them were pressed in the 80s. Only once have I noticed disc rot on one of them (a DVD), and you know what? It still played fine.
To be fair I probably have a handful of discs (maybe 10-15) that stopped working properly because of scratches, some of them still worked if I used another player and some of the discs could probably just be resurfaced.

Early Physical games will one day start failing enmass. Probably early optical games first.

I just picked up GT1 for PS1 and that's working just fine. I have PC games from the 90s also. By the 2040s though we might start having a problem.

I have carts that are forty years old with original batteries that still retain saves. I have CD's that are from the mid-80's that play perfectly. I have PS1 games, PS2 games, Blu-Rays... they all play perfectly still. The only discs I've ever had that ended up not working were second-hand ones, so I assume it's down to storage. If someone keeps their stuff in an attic, car, garage etc, then yeah. It's going to break down. Otherwise, these studies, at least in my experience, are all wrong.

I still play my PS3 from time to time, the games work fine including now 30 year old PS1 games. Far more concerned the console will pack it in long before the discs do. Just because of its full sized hard drive.

PlayStation needs a disc to digital program (like the rumored one Xbox is coming out with) for emulated PS1/PS2/PSP/PS3 games to get added to your account from physical copies. 
Obviously, I know it would not support games that don't have emulated versions available on PS4 and PS5. 

Pretty sure a lot of PS1 games will indeed stop working by the 2040s like you said. CDs of any type are expected to have a very good chance of failure/rot after 50 years.