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I had a cheap(ish) gas BBQ some years ago - always seemed to be too many or too few lava rocks, and issues with corrosion - enough heat to affect the integrity of the paint, condensation when stored, steel parts rusting when not in use, and some sort of galvanic corrosion where dissimilar metals were in contact, especially around the regulator. Didn't really get on with it for cooking either. Eventually bought a similar size and price cast iron job which I think allows more control by moving charcoal around and changing the rack height.
Gas might be good if children or pets are around - much quicker to cool to a safe temperature?
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wood pellet smokers have similar convenience to gas, but you can smoke, bbq and grill
charcoal and wood gives more "smoke" flavour though quite a lot of that is bitumen type oils from the coal, not so much from the wood that has been used for smoking. wood pellet gives a much more subtle smoked flavour with greater nuances from the different woods used.
Seriously tho, the general consensus is don't bother with gas?