One of the most common questions photographers have is “should I upgrade my camera?” It’s right up there with “what lens I should buy” and “can I take selfies with this?” (That last one isn’t actually a common question.)

You may really want that Nikon Z7 or that Canon EOS R, but do you really need it? Whenever I ask myself the same question, I remind myself of a simple phrase that I tell my students thinking about a new camera: Your camera never takes pictures any worse than the day you brought it.

I own a few older cameras. Some I bought for nostalgic value and other were my daily drivers for a time. Over the years, I’ve had a lot of G.A.S., but after having kids, that sort of thing grinds to a halt (diapers are expensive). Now, I’ve learned to really appreciate and use the cameras I’ve got, and in addition, it makes me really think about making every camera purchase count.

I recently got the pang again when I saw the new mirrorless offerings from Nikon and Canon. On paper, they’re specced really well, and one of the new RF mirrorless system lenses from Canon would scratch an itch I’ve been commenting about for a long time: a standard zoom that’s faster than f/2.8, my white whale, the Canon RF 28-70mm f/2L USM. Such a lens coupled with a new, slick-looking EOS R bodyseems like an amazing combo.

Read More: Here’s a Reason Not to Upgrade to That New Mirrorless Camera | Fstoppers