I had the Nintendo Switch since launch. Like everyone else, I absolutely love the system, however, I've always found the battery very lackluster. With most graphic-heavy games like Breath of the Wild, Dragon Quest XI, or Astral Chain, my battery would be almost completely drained in about three hours.
This is the newer, more recent version of the Switch with the supposed extended battery life. I figured it was time for an upgrade and I made the purchase. In all honesty, the battery is much improved over my launch model. My three or so hours of battery life have now gone to about five hours or so with the same types of games. That alone made the purchased worth it, at least for me, being a handheld only Switch user.
NOTE: The left joy con on my system suffers from the infamous 'stick drift' after very moderate use and only after a few months. Something to note. This issue seems to be hit or miss for most people.