I had several Surface Pro units and am still using one. I keep themfor about 2 years each and the keyboards look new. Clean hands and a little maintenance does the trick. Looking at any keyboard with a microscope will alert you to the microscopic life on them but also on your table, countertop your bed, ect...
Microsoft Surface keyboards covered with Alcantara and polymers are an example of a poor design choice due to their durability and cleaning issues, which result in thousands upon thousands of non-recyclable, worn-out keyboards entering landfills each year.