Alarming: No. A precautionary heads up: Yes.
If there is a flash drive with an automatic “refresh†you would think it would be a major marketing point but I have not seen or heard of it and apparently neither has OWC.
To my personal knowledge, this issue has been researched/discussed/argued since 1950 and many white papers, and scholarly articles written about it. The DoD spent tens of millions of dollars trying to find acceptable technologies (remember “Bubble Memoryâ€?) and in the end there is still no cost efffective solution other than periodic “refreshingâ€.
Your idea of built in automatic refresh is not new and was used in Magnetic Core RAM and is still used in Solid State RAM but unlike flash media RAM does not have a finite write life. Our salvation today is the relatively short lifespan of modern computers. The computer is more likely to become obsolete and discarded before the SSD exceeds its write limit. Of course that still leaves us in need of a good archival storage media and there aren’t any in site.