Can players own industries and retail shops?
Do you plan some competition in retail and a more sophisticated demand system?
Yes. And these are the levers
you can use to improve your position against competitors.
aspect of low/high quality (...) buy/sell or research technology
Check out P1SIM's philosophy
. One aspect says "Only Visible Features Are Fun - P1SIM concentrates on visible features, since these are the only ones which are fun." Product quality and research technology are not visible for the P1SIM player. Thus I wont implement product quality/technology differences.
BUT you can strengthen your competetive position by improving logistics quality (i.e. seamless transport flows) and logistics/production technology (amount of intra logistics vehicles, amount/length/type of production lines etc.).
I don't know how many products or what kind of industries you want to have in the game
Check out this topic
and you will see that there are 7 x 4 = 28 different transportable goods types. The number of industries is much higher but undefined, since you can build any factory with any output combination you like. Just build the corresponding production lines in your factory and take care the inbound/outbound logistics work.The end customer (consumer) does not always request the same goods. The consumer demands change over time, which will keep the game challenging the whole time.