We have Orange livebox and have no complaints at all! Often we have 10+ users on at one time with no problems. BUT we use it as our base box and connect up 2 other routers - it is these that people connect to, we never let anyone connect directly to the livebox apart from Family. We have an Apple router and another router positioned in different area of the house. Great coverage and their Livebox app works well too.
yep, sfr at home and orange at work, no real difference between the two as far as wifi is concerned, both have problems getting through thick stone walls but otherwise work fine when in range, i have a booster at work to get the signal from the shop to my office. Its placement seems more important than the model used can’t remember the make off hand (netgear I think for 20 or 30€) found it googling “ampli wifi” 