I'm going to sleep now, so I'll try to answer as quickly and clearly as possible, but unfortunately I'm almost asleep, so hopefully you'll understand
I've read a lot about it recently and it depends a lot on your way of using it, but in general it could be said that for a normal player who will follow the right ways, the internal SSD should last approx. 7-10 years, which is the lifespan of one generation, but it can last even more .
in simple terms, every SSD has a lifespan and usually this lifespan is given in TBW (total number of data that can be written, in Terabytes). In most cases, the drive will last much longer than the paper TBW value. Cheap disks have around 160TBW on paper, modern disks around 2500TBW. I didn't find out exactly what the PS5's TBW value is on the Internet, someone writes 300 and someone 600.. Someone else wrote 190. We will assume that the TBW is 300 for the PS5 console. This value is in ideal conditions (empty disk) and the less free space the worse... (principle of how SSD works, data written on a cell wears out by overwriting and therefore it is ideal to spread the wear over the entire disk and not just on a small part). So, for example, if you had a 600GB disk and had 5 x 100GB games on the SSD (permanently), and then you would install and uninstall the rest of the games, the SSD would last much, much less than if you had, for example, one game permanently and then you would install and uninstall the games just as often. Imagine that the less free space the less balanced transcripts and in other words less TBW.
It's simply true that if you have, for example, a half-full disk, it's much better than if you had a forever full disk and searched every GB to be able to install an update to the game.. then the SSD would go away very quickly.
So if you're a normal player and you won't have a full disk forever, you don't have to worry. Consider that a quality game can have around 100GB. Someone on reddit calculated that if you wrote 100GB of data every day, the SSD would last about 7 years. D
Recommendation:
1) It is highly recommended to use an external nvme disk to reduce the wear on the internal disk. maybe one day sony will allow installing the system on an external drive in ps5 but i doubt it because sony.
2) PS4 games can be installed on a USB HDD, but I'm not sure if a jailbreak is needed for that (this also saves rewriting)
3) Sony also automatically records an hour of recording to the disk, nonstop.. In the settings, this function cannot be turned off, in the settings you can only set the quality as FullHD, 4K, etc.. this also wears out the disk a bit, if you do not need this function, I recommend at least reducing the quality so that a larger amount of data is not overwritten unnecessarily.
4) The function from the previous step can possibly be modified in the debug settings (jailbreak).. the Share and Recording Capture Target option, but I don't know if it works because I haven't tested it. If it worked, Sony would store the data, for example, on a USB flash drive and this would again save the internal SSD.
I hope I explained it a little, in general it shouldn't be a problem if you always keep about half of the free space... nvme ssd disk is highly recommended. By the way, I don't know if you are interested in jailbreak, but I recommend reading the forum here, where you will have a lot of new information. It's good for JB to buy the OG Konzoli and not update. There will be a PS5 Pro for Christmas next year, so also consider if you don't want to wait for a more powerful variant of the PS5.