It doesn't just stop there. They tend to rewrite a lot of things that you could do in SQL on NoSQL databases(Irony..) albeit the implementations are half written, buggy and break on adhoc inputs.
Even more worse, these sort of things come and bite people while these design schemas. After NoSQL database fashion has taken off, schema design, performance tuning et all are rapidly getting rare skills to find people with. This results in all kinds tech debt.
