I also say "never." DS1 never had it, we did the BLW approach. He did feed himself cereal a couple of times, but he hated it. Still does, and he´s two. He will eat just about anything under the sun, but refuses any form of bland cereal.
DS2 will be five months in a couple of days, and we are facing the same issues as you. He wants to take part in mealtime, and will not tolerate being put on the floor if he knows we´re eating. So far, he´s content to play with plates, spoons and cups, so we always put out some extra plastic utensils for him. Once those become boring, we´ll give him a sippy cup with EBM or possibly water, and he can spend some time figuring that out. That´s what we did with DS1 who was very similar at that age, and we made it to 6 months with him.
At some point, probably shortly after 6 months, we´ll start putting soft finger foods in front of him (roasted squash, baked apples, avacado, banana), and if he eats them he eats them...if he doesn´t, he doesn´t. He´s getting all the nutrition he needs from breastmilk, and the food is just for fun in the beginning...at least that´s our take on it. We all had so much fun introducing solids this way with DS1, and I really look forward to doing it again.