Dentures for 35 years. Are full mouth dentures (All 6 on) possible?

1) I've conventional dentures for over 35 years, are full mouth all 6 on denture implants possible? 2) Will full mouth dentures (all 6 on) support the face around my mouth? 3) Will there be a speech difference/difficulty when changing from conventional dentures to all 6 on denture implants, ? 4) Some people experienced air/wind go through the gums and denture implants when they are speaking. Is it normal and if not can it be corrected?