I started on dewalt 20v 15 years ago, and just kept with it because I had the batteries. Probly have 15 tools total now, mostly heavy equipment wrenching and home hobby carpentry, with no real complaints. I will say the xr brushless tools are much better than the cheaper standard brushed motor tools. Especially drills and saws.
This is actually one of my original tools and battery, 15 years old, not pretty but still going strong.
On the chain saw leak, while it should not do it in the first place, there is a known issue and fix
I haven't done this yet to mine but it seems like fixing the oil leak is relatively easy to fix, minus having to take the saw apart.
Not all heros wear capes.
I have had this saw for years, have always just accepted it would leak all over the fing place, until is was about 1/4 tank.
Going to tear it apart today and seal up the actual tank joints per video