When I work with Muslims I don't cook with pork for the office pot luck. When I cook with meat I always mark that on the dish so that vegetarians know not to eat it. (To my knowledge I've never worked with someone Jewish - but given some places where I've lived I think I have without knowing, while I have known about some Muslims I've worked with).
Link to research: https://pubmed.ncbi.nlm.nih.gov/27830946/
Link to full PDF: https://www.researchgate.net/publication/309898157_Seven-day...
Similarly, observant users may use artificial light, they just may not turn it on or off. So there are Sabbath lamps where the bulb remains lit but a shade can be lowered to block out the light.
Are these modern cheats to allow observant users to benefit from the convenience of technology while ignoring the tenets of their faith? I'm no reliogiologist, but if these are cheats, they are ancient ones, not modern ones. For example in past times, people would cook before the sabbath then leave the food on a warm hearth with insulation for later consumption.