Yes, in veg, the game is to grow the roots by starving them for water and forcing them to expand out seeking every last bit in the container. At the end of stretch, the roots also stop growing so much and their role changes from expansion to uptake. In veg we build the roots, in flower we use those roots.
My watering method changes after stretch ends. I try to water more often and with less. Whatever cycle my hard sided containers have settled in on going into flower, I try to shave time off of that schedule by training the plants to expect me sooner, but with less water. If the plants are getting 1/2 gallon each watering to reach runoff, I will give them 1/3 that amount every time the top roots dry out, in 2-3 days. I still want to wait for the bottom to dry out in 4 or 5 days, but I don't want the entire container to dry out and I don't want the top roots to wait 4 or 5 days between waterings. Where in veg, I make fun of knuckle waterers, in flower I become one.
My plants right now in 3gal hard side containers are running a 5 day complete container wet/dry cycle. I have been watering every 2 or 3 days with about a quart of water, just to get the top roots moist. After the 5 or 6 days of the larger cycle, the bottom finally starts drying out and when I feel that 90% of the water has been used up, I will water properly again, saturating the entire rootball to runoff. Who said all waterings must be equal??
Also please note that the way a hard sided container and the way a smart pot behaves at this point are two different things. A smart pot will typically use the water much faster and without so much of a distinction between the operations of the upper and lower root systems. Typically the additional top watering is not needed in a smart pot, and it is easy to establish a 3 day or shorter wet/dry cycle.
Mid to late flower, water uptake dramatically increases and all containers typically move to a shorter wet/dry cycle, making it unnecessary to do the additional top watering. It is all about keeping the medium moist at this point, and keeping the microlife alive and active, where drying out completely as we do in veg would be counter productive. The more water we can coax our plants to uptake in flower, the larger our buds are going to be.