Apparently nVidia believes that people think that anything below 50 is garbage. So the 50 product is going to be very very entry level and there won't be a 50 product unless they are very sure there that will be the lowest product (or they'd have to do some shehanagans like the 2050 laptop if they end up being wrong)
Anything below 50 has generally been garbage. Both AMD and NVidia have a general pattern, that have 8 or 9 as the top card indicator, with 5 or 6 as the bottom for decent cards. With anything below 5 being barely above iGPU and iGPUs are getting better. Better iGPUs have probably killed 3 series cards from both AMD and NVidia for good, and 5 series will probably be more rare.
AMD is often worse than NVidia for naming, but seemingly don't get called on it...
RX 480 - 8 series, Top of the stack, but it was only a NVidia 6 series competitor... So 8 series that performs like 6 series... It's only going to compete at midrage, but still name like top enthusiast card, But that's ok, because AMD...
Then there was Vega - which just ignored all previous patterns.
Then back Navi 1x, where it was more back on pattern.
Latest Navi 3x, has the same top 9 series down to bottom 6 series as NVidia, with AMD 7
600 and 40
60, in a very similar price and performance at the bottom of their stack, and neither has anything below 6 series. It gets more challenging as iGPUs improve, to have a reason for 5 series card, let alone a 3 series card.