I don't think so. My company was remote-first before the pandemic, but we still had about 25% of our staff or so go into an office regularly. The key is to have that remote-first attitude in spite of there being an office. One of the rules we had was "if one person is remote that's supposed to be on a meeting, then everyone has to treat that as a remote meeting and Zoom in". In other words, no one was on unequal footing for important team decisions, and if you had 5 people in an office that were supposed to have a meeting with 2 other remote peeps, those 5 people would jump on their laptops for the meeting, not huddle into a conference room. Subtle changes like this make a big difference.

You mean, you can't have some that are always remote and some that are in the office? Like a split?

That's the same conclusion my company, a Fortune 500 utility company in the US, came too. Their solution? 90% of the staff is expected to continue working remotely as the new normal. Frankly it's working too well. Productivity has increased, employees are happy, we've successfully on-boarded new hires and we can expand the geographical range from which we can hire. Win-win-win. The executives are happy, the workers are happy, we're all saving time and money - this is good!

Luckily/unluckily, companies can operate just fine with tiered systems. They're often more comfortable with this kind of structure.