The OP_RETURN PR may be one of the highest ROI changes in bitcoin history. It

1. Removes Core censorship of consensus valid transactions (described as "paternalistic" by Core devs)

2. Reduces centralization pressure by making certain data stores (OP_RETURN between 81 and 137 bytes) prunable (UTXO set has ballooned to 12GB the past few years)

3. Reduces centralization pressure by eliminating one of the biggest reasons private, centralized mempools exist