A technique probably only I know

You know how the Minecraft spear has a dash ability, right? If you deploy your elytra at the same time you use the dash, you can fly using the momentum from that dash. However, you can't activate the dash while flying with the elytra. So, I came up with this! Briefly close your elytra in mid-air, dash with the spear, then deploy your elytra. Once you've ascended a bit, briefly close your elytra again in mid-air, dash with the spear... and repeat. Yep. By repeating this, as long as you have food and your spear's durability doesn't run out, you can fly endlessly and easily with your elytra. Thank you.