<i>Agreed, but thermostats really shouldn&#x27;t be something we have to replace every 1-2 years anyways.</i><p>Neither are phones and laptops, really. The difference is that those advance at a rate that makes an upgrade compelling. I have a Mid-2009 Macbook Pro. It&#x27;s fine. I put an SSD in it recently and it&#x27;s even better than fine. The only time I get the impulse to replace it is when I&#x27;m near a newer Macbook. In a vacuum, it&#x27;s all I&#x27;d ever need. Sadly (for my wallet), it doesn&#x27;t exist in a vacuum.