I bought an 05 Camry in 2009 and drove it for the last 10 years. I'd occasionally rent newer cars when I traveled and, after the initial euphoria of driving something new wore off, I realized the only thing I consistently lusted after was Blueooth.

So I just got a new head unit like 4 years ago and kept driving that car until very recently.

If you've got a paid for car that meets your needs and is in good shape, I'd just keep riding it out.

Just stay on top of the maintenance and keep it looking good because it'll be tempting to just "throw it away" if it starts looking like crap. I let that happen to my Camry over the last year so it was hard to justify fixing it back up when it was worth so little.