I feel like there’s some missing context here: the late 2000s/early 2010s were also when the nosql craze was really taking off: Cassandra was open sourced in 2008, MongoDB came out in 2009 and spawned the “MEAN stack” (remember that?)

Using SQL was extremely unfashionable then, so it’s no surprise that developers at Mozilla/Oracle (and even Google and Microsoft) were not keen on adding a sql stack.