There is literally no possible in-office benefit that can ever top never having to commute, or eliminating all time-sinks of office life and replacing them with casually doing chores, taking naps, and cuddling and sex with my partner (who also works from home) scattered throughout the day.

That's why I'm never, ever going back into an office under any circumstances. Are there drawbacks? Absolutely. You're damn right collaboration is harder over Slack than in person. But my home has benefits the office can simply never beat, benefits that vastly outweigh those of the office in terms of quality of life.