I trad my shops to, if anything its faster! I can park up grab my bucket and take a walk into town, some places i couldnt get to with car so wfp would be a waste of time.
Ive been doing this 10 years now, and went wfp 5 years ago, i was a die hard WFP'er when i started with it but after alot of experience now i think wfp is just another tool, ill do either, just not off a ladder. Ill do which ever is faster, and besides, everyone know trad is better than wfp.