How do you care for succulents? Root care is the key to growing succulents well

Many succulent growers run into this problem: I feel like I have been growing this succulent for a long time, but only when I repot it do I discover that its root system is not good.
The reason I ask about watering and repotting is to first use these questions to guess how well this succulent's root system has grown. It can be put this way: for a succulent with strong roots, even a serious illness is often just a minor one, while for a succulent with poor roots, even a minor illness can turn into a serious one.
A succulent grown for a long time does appear, judging by signs of growth, to have settled into its pot, yet in the end it still failed to grow a strong root system? What causes succulent plants not to root downward? You can consider the following 2 points:
1. Watering is shallow and frequent. Because you water frequently, you do not dare to water thoroughly each time. This way of watering only creates for the succulent a growing environment in which the surface soil is more moist than the lower soil (succulent roots also exhibit hydrotropism).
2. Ignoring the water-retention capacity of the succulent plant's shallow root system. It is possible that the surface soil has already dried out, but the moisture below the soil is still sufficient.
Succulent plants are sometimes very "lazy" too. Although roots are important, for them it is enough as long as they are sufficient. When the roots are always moistened by water, there is no need to expend great effort growing roots.
If you can change the pattern of frequent shallow watering, that is, delay your usual watering time by double or even longer, and it still does not have an obvious effect on the condition of the succulent plant, I believe your succulent will definitely have a very strong root system. On this basis, it is best to water thoroughly.