As a former (short-term) resident of Lubbock, I can tell you Caprock has made some good (but not great) wines over the years. I would have guessed they had been around closer to 30 years, but that would be some fuzzy memories now. Caprock's "problem" from a marketing perspective, was that they always played second fiddle to Llano Estacado, which is Texas's 2nd biggest winery (by volume/production).
They are located very close to each other on the southern outskirts of town (Lubbock has just over 200,000 people), and the region has excellent weather for grape growing, especially to the south and west of Lubbock. Lots of flat, cheap land, lots of sun, cool nights, low humidity, not much rain. It's either ranchland or nothin', mostly - irrigation for most crops is just too expensive.
The business end must have collapsed because I can't remember the last time I saw more than 1 type of Caprock winery on sale at local wine shops. Llano Estacado typically has 6-8 types available, i the Texas section. Texans are very partial to Texas products - virtually every liquor store and even the grocery stores has a dedicated Texas wine section. So most Texas wineries can find at least one or two receptive retail outlets, if they know what they are doing. That doesn't guarantee success, but I can tell you Dallas-area wine stores do not carry wine from New Mexico, Missouri, New York or Virginia - only California, Washington and a little bit of Oregon get any exposure as domestic producers.
