I use a pedal or clip-on tuner before I start playing, and used to use it throughout, but while playing alone, I’ve been practicing getting it quickly back in tune without a tuner. I’m getting decent at spotting the culprit quickly, and I can re-tune a bad string to the guitar well enough. I saw Marc Ford play plugged straight in, and he volumed out and held the neck up to his ear, gave a quick twist of a tuning peg and was back in business, all in maybe 7 seconds. That’s where I want to get. I’m not against tuners, but someday, machines are gonna fail and then the system is gonna fail.