As others mentioned, the SR wasn't technically cancelled (per Elon's tweet today), but just removed from the site so you can still buy it but you'll have to call Telsa or go into the store and place an order for one.
That said, if the SR works well for your needs, including the range that you'll get out of it (I had a Model 3 SR+ so I'm very familiar with low 200-ish mile range), then it's a perfectly capable car to get and you're saving a lot of money over the LR version if you don't need the range or dual-motor setup. I technically don't need the extra range, but I was able to afford the difference so I decided to splurge on my Y order. Otherwise I would've gotten the SR version and been perfectly happy with it.
My only advice is to hold out on the SR delivery if you're able to, and wait for a higher VIN (newer build) so you can get the update console, heated steering wheel, dual pane windows, and a few other things. Probably won't get the updated headlights, but the majority of the current builds don't have it.