>I can find a lot of information from around 2018
I would guess that's because this was just a passing fad.
Genetics is an extremely complex topic. And we still don't know a lot of things.
This is why I think nobody was able to create something useful for consumers.
For accuracy I think the 'next generation' methods are pretty good. Especicially when we talk about reference-based sequencing. This is the case when we already have an assembled genome when can use to compare our new data.
For diagnostics it's not that useful when we talk in the context of a large population. There are some diseases associated with some single nucleotide mutation (SNP [0]). The is that in most cases we don't have a way to reliable to say "mutation X causes y". In general the medical history of your family is way more useful than any genetic testing.
For privacy this is a nightmare.
For genealogical information they don't provide anything meaningfull.
[0] - https://en.wikipedia.org/wiki/Single-nucleotide_polymorphism
