My experience as someone who owns a HP Omen gaming laptop:
Not as portable and convenient as you may think. It weighs about 5 pounds, like a bag of potatoes. It uses a lot of power and needs to be plugged in if you want to play for longer than 45 minutes. The charger consists of a heavy cable a power block. I can however move it from the Study to the Living room if I wish to.
It boots up extremely quickly. I can go from power off to playing a game in about 5 minutes. I can exit a game and leave the power turned on, and then reopen the game and start playing within a minute.
It has a 2080 super graphics card which means I can play any game I want. I have never had any performance issues even playing games like Elden Ring on max settings.
It was expensive. Seriously look into refurbished options if possible. I got mine refurbished, works like brand new and have had no problems over the past 4 or so years. I saved about £3k doing this if I remember correctly.