Yeah, if you look at a flagship nRF52840 board like the Xiao Seed, it ships with an integrated lithium charge controller, and just 5 μA power draw in deep sleep. If you are building any small battery-operated device, it's a no-brainer
I had to choose between an ESP-based and nRF-based MCU for my MeshCore node, the power consumption between the two made it obvious the nRF one was the way to go for a solar-powered repeater.