Where are you based by the way? Just don't commit the mistake of launching your vehicle parts shop that only accepts Bitcoin payment. If you do that, your shop might have few to zero customers. But if you accept Bitcoin payment alongside fiat payment, card payments, and other online payment options, then there's no problem and you are probably good to go. The mempool is still congested with more than 300,000 unconfirmed transactions. Fees are still high. This might discourage your customers to pay in Bitcoin.
It's true what you say, of course someone will think twice about transacting this asset with fees that are still quite high. Personally, of course I don't want to pay for Bitcoin, because I know this asset is very, very rare, so now it's better for me to hold it for a longer period of time. Of course, as a customer, it's better for me to just use cash, because the cost difference is enough to buy another product.
For Op, the breakthrough is very good in the Crypto currency payment industry, but you need to remember that if you make transactions with customers, what do you do with Bitcoin and hold it longer or what?. As we know, prices fluctuate greatly. What if prices fall sharply, Do you have emergency funds to cover product shortages in your store?