> Most of the interesting electrical issues that could exist are burred in walls and not accessible Assuming the electrical work was done by electricians and n

> Most of the interesting electrical issues that could exist are burred in walls and not accessible Assuming the electrical work was done by electricians and not total amateurs, there should be absolutely no issues inside walls/ceilings, every splice or termination must be ‘accessible’, which means in a junction box that is not buried in a wall. If a box is inside a ceiling or wall, an access panel would make it accessible. Electrical issues are almost always at the point of termination, unless you have animals chewing on your romex insulation. Bad splices and terminations cause arcs, which cause fires, which is why AFCI breakers are now mandatory for almost (unsure if it’s all or not, I work on the commercial side) every receptacle circuit inside a residence. Aluminum wiring caused fires because aluminum expands and contracts with heat faster than the terminal screws that were used in the wiring devices of the time. Now we have AL-CU devices that eliminate this problem. You can’t always count of electrical work being done properly though.