Or I can just do whatever is most productive for my workflow and not have to worry about RAM, not worry about managing tabs, not worry about what windows I left

Or I can just do whatever is most productive for my workflow and not have to worry about RAM, not worry about managing tabs, not worry about what windows I left open that I might or might not need later, worry about the ram consumption of different apps I want to use, etc, that's also an option. Dunno why you're making it such a huge deal, convenience and productivity are after all the goal.