Of course you are totally right. AOR will never do the decent thing whilst DV10's are still being purchased. I understand why people who either do not know, or cannot accept a Company that has produced very good quality equipment in the past, are still buying it. Also there are those who post that there is nothing wrong with their AR-DV10, and throw doubt on those who post differently, after exhaustive testing and comparison.
No doubt once one has paid that much there is an element of not wanting to believe the actual position too.
This is further complicated by the fact that the frequency drift concerned will not be much of an issue when receiving Analogue signals, or very strong Digital ones. Only when compared, side by side, with a good, stable Digital Receiver will it become apparent. With weaker Digital signals,them being 'off frequency' will be undetectable. No squelch opening, no audio, nothing to indicate what signals the Radio is missing.
These points are relevant to the proposed AR7400, because one might hope AOR will at least make sure it is correctly tested before release, and not rely on the reports of those who supposedly tested the AR-DV10.
Despite the Icom IC-R30 being an excellent receiver (sadly lacking DMR), at almost half the price of the DV10, there are no doubt many (including myself) who would pay the extra IF and only IF the AR-DV10 was correctly modified, and a new version released by AOR.
Any noticeable heat related frequency instability is totally unacceptable in this day and age. Something that can never be completely 'fixed' by firmware releases. Only a redesign at hardware component level would do.