Several people, myself included, expressed frustration with the time, cost, stress, of preparing reasonably healthy and tasty meals.

I struggled with this problem for years. A few months ago I hit upon what is, to me, the ideal solution. I pay someone to come to my place twice per week and prepare all my meals. I live in Argentina so the cost of hiring this person, which is about USD 80 per month, is unlikely to reflect what you'd have to pay for a similar service in your own country. The fact that I only eat salads (including fruit salads) also lowers the costs considerably, so you'd very likely have to pay more than I do if you are located in Europe or North America.