Lots of good advice, and none of their experience is going to be your experience.
One block down saw might not fit all situations for you. If it is light, and light is right for you, good.
If you are blocking down pine, not oak, you'll be in two different worlds.
Be sure to have your chain super sharp for smaller horsepower saws, keep your filter clean, and your technique dialed, and you will probably be good for a lot of what you do. If you realize that it is underpowered and way too heavy, sell it and upsize.
Your style may lend itself to a climbing saw for working your way up the tree, a medium saw for a lot of the blocking, then when you are not getting the performance that you need, lower your medium saw, and pull up the larger. You don't need a 361(or whatever brand) for 12" wood maybe, but as you get up to 16", 18", 20"+, you may want that extra HP. Could be your most efficient.
If you set up to lower your current saw, and pull up the next biggest at the same time, counterweighting each other through a pulley or 'biner, its lickity-split change over.
Take everyone's advice as their best, well-intentioned advice, and tailor it to you, your typically wood, etc.