The original posters question is really unanswerable.

What you need is equipment that will handle the conditions you experience. The trick here is being able to predict those conditions.

For me I do "summer" camping in Europe. This includes spring and Autumn. I like to be warm so I carry a Coleman Hudson 450 sleeping bag. I have never found it wanting even in icy conditions in the Alpine mountains, frost pockets in North France or snowed in in my car. I have two tents. A four man double skin tent that is very warm and waterproof (£30 Argos) and a cheap £10 dome tent, that keeps out rain including heavy thunderstorms in the Pyrenees, but being single skin is a bit warm in the sun and cool in cold wind. The bag compensates for this. It does not need any pegs to be erected, but works better if they are. Can be moved easily when erect so you can squeeze it into exactly the right position when wild camping or seeking shelter.
Of course in unpredictable conditions either of these tents could fail but the balance of probability is they wont.

I have three stoves, a £10 one that fits on top of a 270/470 cartridge, an Optimus omnifuel and a gas double burner with grill for car camping. I have just completed a 2,000 mile trip with wife in the car to Rhein falls Switzwerland, bike rally in N Germany and back. Despite being in the car and having room, my stove of choice was the £10 single burner. because it is very quick and simple to deploy for a quick cuppa and will simmer properly when heating or cooking food.

In the end it is down to luck and your own perceptions of risk. I have chosen to break down the functions of different pieces of equipment. The tent to provide shelter and keep me dry. The bag to keep me warm so I can sleep. Mt camp bed to keep me off the floor. the stove does its job of heating drinks and cooking.

As I said, making the perfect choice is impossible, often even with hindsight. Same as looking for the perfect bike.

Oh! yup, I went by car as my Enfield is still in bits after the crank failed last year in Poland, but rattling or not it did get me near enough home to get home.
Ok so the Enfield was on that occasion not up to the job but without it I would not have chatted to the German biking couple at the campsite in the Alps, or the hotel manageress in Germany who wanted a small enough bike so she could ride with her husband. Nor the two young Czech lads on a country road who were riding harleys that were older than themselves which they had both lovingly restored. They reminded me of my early biking days back in the early 1960s (1961 to be exact) when I and most of my friends rode bikes as old as we were, many ex WD from the war. Courtesy of "Pride & Clarke".