In my opinion they are not worth the extra cost because your standard brand name SSD comes with a 5 year warranty and chances are if it reaches 5 years of regular use it will likely last many years beyond that. but even if the standard SSD’s don’t last much beyond 5 years your still better off saving the $ (by getting standard over pro) and putting it towards whatever is new say 6 years from now(assuming the standard 5 year warranty drives died around 6 years) as the money you save from buying a PRO currently will likely be enough to buy the same capacity drive, if not larger, in 6 years or so from now and things will probably have even better life span to and might even be faster to.
like currently looking online real quick… a Samsung 860 EVO vs Pro with the 500GB range of SSD’s (which are the largest SSD’s most people would buy currently as they are the sweet spot for most people), there about a $80 difference, so it’s far better to save the $80 (by getting the EVO) and in 5+ years of time, if the EVO SSD happens to die, you can likely get the same or better than what’s available now for that $80 or so that you saved by not getting the Pro and not only that it seems likely you will get more than 10 years, between the two SSD’s, should the initial one happen to die not long after the warranty expires as it seems like the odds are in your favor to get a fair amount of life over the warranty period especially between two name brand SSD’s. plus, like i was saying above… in 6 years or so of time from now I would imagine SSD’s life spans will be even better and likely faster to even though I realize that there is not much room for improvement for SSD’s on the SATA interface since they seem to be roughly topping out the SATA III interface. so who knows how much longer SATA will hang around but I suspect it should still be pretty common in 5+ years for desktop computers.
so basically… it makes little to no sense to get the Pro over the EVO for the vast majority of people given the info I just mentioned.
but that aside, what you experienced seemed to be what I have generally heard with SSD’s which is why I tend to prefer regular hard drives for storing more important data (and, as you already know, you get a lot more storage space for less $ with a regular hard drive over a SSD) and use SSD’s where speed is of higher importance.