If you’re in that boat, worth holding out for a possible price drop once the tax credit expires — if they lower the price again you could conceivably upgrade for the cost of autopilot and effectively get the SR+ upgrades for free (not to mention the fact that you got at least some tax credit). Interesting arbitrage opportunity.
Yes exactly why I bought the SR vs SR+ arbitrage opportunity early 2020 ( and I can charge the upgrade on my card for points which they wouldn't allow for base price )