Complex sentence: By 2014, many SSDs had internal background garbage collection mechanisms that work independently of trimming; although this successfully maintains their performance even under operating systems that do not support trim, it has the associated drawbacks of increased write amplification and wear of the flash cells.
Split into simpler sentences: By 2014, many SSDs had internal background garbage collection mechanisms that worked independently of trimming. Although this successfully maintained their performance even under operating systems that did not support trim, it had the associated drawbacks of increased write amplification and wear of the flash cells.