50 years old? Most of the landlords I’ve dealt with in my life consider 100 year old outlets to be perfectly sufficient, along with their carrying capacity and number in each room.
“ it was enough to power a lightbulb in 1925, so it should be perfectly sufficient for your needs with all of your TVs and computers and such.”
With one landlord, I actually had to call the city inspector into the building in order to verify that the power supply for each apartment fell beneath city requirements. He spent the next three years doing everything in his power to get me out. It cost him 50 grand.