After COVID, there are many more remote workers. Especially in very expensive cities. This
piece from Bloomberg compares the foot traffic at a chain of sandwich shops before and well after the pandemic lockdowns. Visits in NYC are down to 40-50% of its pre-COVID high across the board, whereas surprisingly the British are mostly returning to normal*. With office blocks and retail units going empty, I'm not surprised landlords want to find something else to fill them.
There are a few problems though. Often, the rents on those units are implied by the mortgage; the bank lends $X to buy a property on the assumption that rent of, say, $X/25 per annum can be charged. Well, it's much less likely a resident can afford the rent that a commercial unit would carry, unless the rental units are more split up, which tends to lead to rather inefficient use of space. Residential units also require more upkeep, have stricter regulations (not sure about the US, but things like heating and plumbing systems are usually the landlord's responsibility in the UK, and it can become a life-safety issue if heating fails in winter) and these tend to be let for shorter periods of time. It's also more likely that a residential tenant will default on their rent and then be very difficult to remove. Charging less rent to attract tenants is often prohibited by the bank, because it effectively devalues the property.
I suspect we will see a crash in commercial property values in the longer term, because landlords aren't going to be able to cover mortgages on no rent, and aren't allowed to charge less to tenants that are willing to pay.
*I do find this an interesting anomaly; but I note most companies in the UK are going to a three days in the office hybrid model rather than fully remote. Not sure what's typical in the US, I've heard some Bay Area companies are still fully or mostly (>4 days/week avg) remote.