Here’s a suggestion for those who are struggling with their TiVo boxes post the recent software change:
I have no big issues with the speed of my TiVo. My main box is a 1Tb Samsung but it is a recent replacement after my previous one had developed disc problems. That means I have only Series Links and Wish Lists from the last few weeks, no Favourite Channels and I’m not currently using Suggestions. My disc is only around 25% full at the moment. And guess what? The box works fine for me - it’s not as zippy as the Now TV box but it is not noticeably slow either.
If you have a TiVo that’s incredibly lethargic and are okay to sacrifice your existing recordings (you’ll lose your recordings if you leave VM anyway of course) it may be worth reformatting the TiVo’s disc and seeing how it performs before jumping ship. Not a permanent solution, but it may sort things out for you until the new TiVo arrives for your consideration.