The whole Bitcoin Core op_return fiasco has laid bare how horrifically centralized the Bitcoin ecosystem really is. Bitcoin Core is the only really viable implementation of Bitcoin. This may be the biggest threat to Bitcoin right now. We need different node implementations in different languages with different architectures made by totally different people.
The fact that the only real alternative to Bitcoin Core is Bitcoin Knots which is just a fork of Core except with one guy yoloing commits should be embarrassing.
This is the biggest threat to Bitcoin and the only solution I see is for companies which rely on Bitcoin to sponsor developers to work on different implementations.
That’s my rant for the day.