Huh? Point to where I said anything about that not being possible.
The flash is rated for X cycles per block, at a certain set of voltage and current limits. Going over those is faulty design. Ddesigning other components not be able to survive rather well known voltage and current levels, and ripple within spec, would again be faulty design.
This!
Some of your posts in this thread don't really seem to make a lot of sense to me. Sorry!
Maybe if you could somehow make a particular, clear, technical point, and properly back it up with link(s), from reliable sources, I would have more faith in what you have been saying.
---------------------------------------------------
Tl;dr [Sorry, typing Diarrhoea] The following is mainly MY opinion, rather than something I can link to on the internet.
I think that the (partial) issue with these USB flash pens (whether 1.0, 2.0, 3.0 or whatever), is that they are often designed DOWN to a specific price point, rather than designed UP to a particular quality point.
I would advice treating USB flash pens with caution. They are fine for moving data around, and keeping data with you, but they tend to be less reliable in general than other computer data devices. Both as regards data integrity, and device life time.
As with virtually everything else, there are good ones and bad ones, and all sorts of stuff between these extremes.
I would NOT recommend using a USB flash pen as a primary/only/master data store or backup store (casual backup is fine, but IMPORTANT/main backup not so good an idea), as they can be problematic.
My understanding is that, as well as the flash devices inside the device failing, the interface (USB) circuitry can also fail, and/or other stuff in it.
Potentially the USB connector could be the source of problem.
With gentle/moderate usage, and only using in situations where sudden complete disappearance of all data on the pen, is NOT problematic, then they are fine.
I treat my USB pens nicely, clean, have other copy(s) of the important data, and try to buy reasonably decent ones (by appearance, reviews, brand loyalty, etc), rather than paying excessively high prices for them.
Even if USB flash pens were absolutely 100% perfect, reliability/quality wise, their very small size (relative to most other computer equipment), and the fact that you may sometimes take them with you outside of your home/work, mean that they are more likely to be lost/stolen/dropped/damaged etc, compared to say your HDD/SSD in a desktop PC, which tends to stay in the same place, quietly for years at a time.
-------------------------------------
If USB 3.0 is less reliable than USB 2.0 (my own opinion again, I DON'T KNOW for sure about this), then it could be because the much higher potential transfer speeds, would generate significantly more heat inside the components of the USB flash pen.
Hence, as with most/all electronics, this heat tends to be a cause of unreliability and shortens the lifespan, of e.g. The interface chip(s).
I don't know specifically for USB flash pens, BUT as regards some other computer devices, exactly this phenomenon (too much heat build up, on cost reduced (fanless) device(s)) is (widely?) reported on the internet. Unfortunately the problem is ultimately blamed on the relatively low consumer price of the items, which make less than satisfactory designs, succeed in the market place.
And properly designed ones would tend to fail to sell, because of their prohibitively high price.