I've used it as a negotiation advantage several times in the past. The area I'm investing in has a LOT of buyers who are looking to flip multis as high end condos. They want them vacant so they can get it, do a lipstick job, and flip for cash. Most make offers contingent on vacant units, my offers are always "as is" in regards to the tenant situation. Sellers will often take my cash as it's a much easier path for them.
I of course do my own due diligence, making sure that all the tenants are paid up, month to month, and don't pose any specific known problems.
Once I have the property, I give a notice to quit to tenants in the unit with the lowest rent in the building. Once removed, I renovate the unit and rent it at market value. Once it's bullet proofed and rented, I rinse and repeat with the second lowest rent until I'm done. If the units are already nice, the tenants good, and the rents at market (they literally never are), I would just write up new leases and move forward.
Granted, ALL of the numbers have to make sense for this to work, and it's not going to work in every area, but I've found success with this approach.