Maybe 90% by count, but not 90% by volume of transactions, prominence, etc. Bitcoin seems to be entirely resistant to moving away from PoW and Ethereum have been in the process of moving to PoS for years.
Pop quiz: What will happen first, Ethereum PoS or the year of linux on the desktop?
Yes, 90% by number transactions. Binance chain, Solana, Luna, AVAX, ADA, DOT are doing around 15 million transactions a day altogether while Bitcoin and Ethereum are only doing 1.5 million altogether.
Pop quiz: What will happen first, Ethereum PoS or the year of linux on the desktop?