I think remote working has contributed to lower productivity wherever it has been tried. Himans are very poor about keeping their promises to work harder tomorrow to make up for the laziness today.
Studies have shown otherwise. The last one I saw showed that overall productivity stayed about the same or actually even increased during remote work for the majority of companies.
Depends on the business, I think. Some places are reporting higher productivity absent excessive meetings, long lunches, there’s much less sick time, fewer work related lawsuits, etc.