I'm not arguing "more accurate" I'm just saying CNC does not automatically equal magic accuracy. For example, if you need to turn many components the same, a copy lathe will do the job. A jig borer can be set up to gnats pubic hair accuracy, a match grinder (many made by the Swiss) will turn out near perfect components. As you say, in-cycle gauging is valuable but not limited to CNC.
When I was an apprentice for a Swiss company, I visited a machine tool works in Zurich and was in awe of the size of the tables and machine beds used to machine pillars, tables, the knee and many more parts of both horizontal and vertical milling machine's and CNC milling machines and lathe beds and gear cutters etc. I was even more surprised to find they were being machined on English Machine tools!
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in Varmint Rifles & Heavy Plinkers
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When I was an apprentice for a Swiss company, I visited a machine tool works in Zurich and was in awe of the size of the tables and machine beds used to machine pillars, tables, the knee and many more parts of both horizontal and vertical milling machine's and CNC milling machines and lathe beds and gear cutters etc. I was even more surprised to find they were being machined on English Machine tools!