https://blog.ethereum.org/2021/11/10/arrow-glacier-announcement/Arrow Glacier Upgrade Announcement
Posted by Tim Beiko on November 10, 2021
"The Ethereum network will be undergoing a scheduled upgrade at block number 13,773,000, which is predicted to occur on Wednesday, December 8, 2021. The exact date is subject to change due to variable block times and timezones. Please upgrade your node before Wednesday, December 5, 2021 to account for the variable block times."
A lot of upgrades are scheduled for the next year or so. Possibly the institutional interest in ETH may be holding back until Fees/Scaling issues are solved, and glitches in that process (which are perceived as inevitable) are ironed-out.