There's more info and opportunity there than is on the surface too.

All surface, all the mechanicals look good.

They will tell you how hard the surface (coating) is, but since the underlying wood is soft, dragging a piece of heavy furniture without a slider will crush the underlying wood and leave long dents (technically not scratches, I guess, if the surface isn't broken).IMO, your rip out & replace estimate sounds way high, at least for my area.

When I say "tired" or "rough" or "run down" or "abused" it doesn't even scratch the surface.

Your mention of a "blue hue like bread mold" on the surface of shoes points to a chronic humidity issue.

Wash every surface with a good industrial degreaser.

Think about this on the surface level....

Plus it really does hide any imperfections in the surface of the wall.

You need to find out exactly what need to be done, but on the surface, I think you're looking at a major rehab.

(Granite, Quartz, Solid surface, etc.?)