> Even when I thought I found the right one my laptop would occasionally end up in some weird state between discharging and charging - taking power but not ackn

> Even when I thought I found the right one my laptop would occasionally end up in some weird state between discharging and charging - taking power but not acknowledging it in software and slowly discharging but not as much without power... This is actually pretty common in new macs. The computer can consume more power than the power bricks that came with them can provide, so they use the battery to augment it. Not a big issue if it's a relatively intermittent load, but a silly PITA if the load is constant. This is also somewhat related to the limits of PD at 100w (20V 5A) IMO, what you're missing is... nothing. The pros are the lack of polarity (usually) of the plug and the ubiquity of USB-C ports is nice for the basics. But anything remotely specialized (non-trivial power supply, thunderbolt, DP, etc.) and it becomes a crapshoot of "does this cable support this" and "does this specific port support this" - both of which are "no" far too often. My favorite example is a bluetooth headphone adapter with a USB-C port that won't charge unless the other end of the cable is a USB-A adapter. I'm waiting for reports of a fire from a cheap cable that tells its users and connected devices "sure, I can support 100w of power delivery."