Just went in for brake pad replacements and found that all the caliper guide pins and the left piston were sticking. Replaced the piston seal and lubed all pins and piston. And it's back to business as usual.
I reckon it's because I was too kind to the brakes for too long. If I had abused them more often, we would have detected the seizing guides and piston much earlier due to faster pad replacement interval (been 5 years on the front ones). So no more wussy cadence braking or engine-rev matching. Just stomp it hard and watch out for screeching cars behind me from now on. The brake pedal actually feels squishy like a normal car now