They might be getting newer but they won't be getting better. Sometimes "up dating" is not moving up. Mine has black knobs and the lenses above each dial for the lighted colors.
This was the same Westy set we had in the house when my parents married in '81. The range top was replaced after a small fire on moving day with a GE but the oven was kept (odd size) and matched the coppertone Hotpoint dishwasher. The pink & gray boomerang Formica was lost as well. :-(
Westinghouse built some of the very best ranges ever,My hometown is full of the built ins, and I know of at least ten houses ive been in that are still using them with no repairs, those Corox units last forever.
but the infinite switches were the fragile link in their ranges. Westinghouse ovens from the mid-50s on were more heavily insulated than those made by GE. GE's broiler reflector, which helped the broiling performance, was added to compensate for the thinner insulation between the oven cavity and the rangetop.