Quite right, though perhaps it's not so much a question of ignorance, rather laziness. I haven't seen any obvious changes in their website design in years! Nonetheless, it is inexcusable if a given company fails to implement a secure form of online payment on their website, especially in this day and age.
Certain companies, including R-Comp, should consider upping the design standards of their websites. Many simply look dated, as well as very unprofessional. I believe NetSurf, as a freely available browser for all users, allows the use of more modern designs. However, I'm not sure how well NetSurf is able to handle secure online ordering though.