Most of my lighting work is recessed lighting in older Valley homes, and the difference between a good job and a bad one is the layout and the drywall plan, not the cans.
Layout planned to the room and ceiling framing, LED wafers or cans, dimmers that do not flicker, and openings planned with you before cutting.
Pendants, chandeliers, sconces, and ceiling fans, including fan rated boxes where the old box cannot take the load.
Patio and landscape lighting, string light circuits done properly, and security lighting on the right controls.
Flickering that follows the circuit rather than the bulb is a wiring symptom. That becomes a troubleshooting visit, and if the wiring era is the problem, see rewiring.
I'll give you a real number, in writing.