I'm assuming this is "heating food". You can edit your post.
we will also use it to make pizza, lasagna, cakes etc.
Are you talking about baking? How often do you see yourself baking? If it's more than once a month, I'd recommend not getting a combo. Get a microwave and a separate OTG. Get a combo only if baking is going to be occasional, like less than once a month.
Combo ovens are not really built for baking. Too little space, no extra trays, and easy to burn yourself while taking stuff out. Not to mention convection tends to dry out food.
Both my parents and I have LG microwave ovens. My parents, who don't do any baking, have faced no issues with it in over 10 years. My oven's PCB burnt out in one and half years of regular baking (cookies, bread, and Pizzas). Got it repaired for 2.5k, reduced frequency of baking. Been working fine for 1.5 years since then.