The BIP-110 minority fork faces structural difficulty in advancing because it inherited the same mining difficulty target as the dominant chain while losing most mining power, potentially requiring 25 years to reach its first difficulty adjustment.

"The problem comes from Bitcoin's difficulty adjustment system. BIP-110 split away at the start of difficulty period 477, but the enforcing branch inherited the same mining target as the dominant chain. Losing most of its mining power therefore did not immediately make its blocks easier to find."