OK, somethings really bad has happened these last two updates... 
I'm following updates closely now and am on the latest 128.0.5807.25
Over these past 3 or 4 updates the behavior has changed and Tabs lag, long wait times and memory consumption is extreme (yes, even for a Chromium based browser)...
I run like 6 "workspaces" and switch between them quite frequently, and each workspace has between 5-25 tabs open, so a total of maybe 120-130 Tabs open.
Previously there's been no, or little "lag" between switching workspaces, but now the workspace icon will shrink, then the page goes blank, and it's switching to the workspace, but then "freezes" for several seconds, sometimes up to 20 seconds before the new tab is loaded properly.
The whole taskbar and tab bar is "frozen" during this time.
Sometimes it switches back to the previous workspace instead of showing the one I clicked on.
I have "Snooze inactive tabs to save memory" on, Opera AI is off, Battery saver off, Mouse gestures off, Early Bird off.
Running on a Intel Core Ultra 9 CPU, with 32 GB RAM, Nvidia RTX 4060 GPU 8 GB with Windows 11 (up-to-date).
Opera is eating about 8 GB memory at "standard", when started and "untouched" it goes for around 5 GB, but as soon as I start fiddling around a bit with Tabs and switching it goes up...
I've already tried clearing out all cookies and browsing history, as well as "replacing" the session directory on the HDD (which helped briefly, but after a week or so I'm back to the same issue).
Anyone else?