Whitemountainhiker,
Yes, one can down load a copy of Strips and Treats, but if you read it, you will find that it is a 2010 copy last published in 2013. I suspect that the charts will be a little out of date.
My 2015 Street Alas is only a few years better. It wasn't all that good when it was new in 2015. One place we were planning to have a day's drive around and were pleasantly surprised by an uncharted bridge. Then later that same year we were mis-directed to a bridge that had be torn out two years before.
There is no replacement for these planning and navigation packages, that is all there is to it. When I can really get universal internet coverage with no dead places, then I might accept a web-locked thing.
Matt