[mnem]

I think your second paragraph there is the critical point that large companies (including the one I work at) miss or purposefully ignore: let the employee control when (and how many) days they are in. Cohesive teams will self organise something suitable for their productivity, non-cohesive teams won't get any better by frustrating x % of the members. But, fundamentally, large companies simply lack trust in their employees so do not want to allow this.

Also, they have a lot of real estate costs to justify. Nothing like physical tech debt for anchoring your company in the past.