I have 2 tables in which I want more robustness and fortunately don’t require frequent rapid fulls of data and examination.
All other tables would inevitably be MyISAM.
Can I safely use both (I’ve read a handful of discouragements from this) without fearing bugs or data getting affected by differences between engines?
Yes, you can.
Note that only
InnoDBtables support transactions andFOREIGN KEYrelationships.