Depending on what you mean by remodel and what your local jurisdiction considers, that circuit probably did need to be upgraded to four wires. Yes, there is a safety increase in doing this (which is why the code changed).

Of course, you get no benefit unless you install a proper 4 wire plug on the range. Most relatively modern one have a strap between the frame (what should be connected tot he ground) and the neutral.

i personally would replace it, but i do not like neu/earth combined.

Thanks for response - all things considered it probably makes sense to upgrade - cost and time is not that significant given inceased safety - yes stove is set up to handle four wire with 4 wire lead - also remodel was total right down to studs - again, thanks

nuetral - earth are ALWAYS combined. Look in the meter box. Look at the pole. There are only 2 wires there.
Nuetral - ground combined and one hot. Only after the
transformer are there 3 wires. again nuetral-ground combimed and 2 hots.

i already KNEW that, since i was 10.

It is actually a rather minor risk, and that was why it has been allowed for so long.

With hard wired equipment or the large receptacles and plugs used for stoves and dryers the chance of losing the neutral is very small.