Apple will probably repeat it again, remember that this is not the first time, they did drop Series 4, 5 and SE 1 at the same time ! Next time Apple will drop a watch, it will be the series 9-10-11-se3-ultra2 and ultra 3 which is one more watch !
Fortunately, you will be fine with a series 12 if the chip is improved (like expected) (and of course they will drop the series 12 at the same time of 13 and 14 if they have the same chip)
A Casio is a fine watch, but it’s an entirely different device to an Apple Watch. There’s not really any point in comparing them, they serve wildly different purposes.