Simple things that would be a 30-second conversation in the office are now 30-minute Zoom meetings.
Slack noise -- already a distractor to begin with -- has gone up 10x.
If I have X hours at home or in the office I know exactly what limited amount of time I have to accomplish a task and can more easily allocate chunks of that time to specific needs.
In lockdown it's like living/working in a casino with no clocks and no sense of time or progress and it's harder to do time management (IMHO).
If I need something from someone in the office I can walk over and ask, virtually people have the ability to ignore you for days on end without consequence.
I have no doubt that some people's personalities prefer this style of interaction but I hate WFH like this (in lockdown) or this much (months on end vs once a week) despite having no kids.