True. Right now at current rates and prices. Not alway true.
Not to mention the other disadvantages of I-Bonds: low purchase limits, Treasury direct. Consider an individual TIPs ladder in an IRA/401k Brokerage account. Institutional Pricing, Zero expense ratio, Zero risk if held to maturity.
I started a ladder awhile back, but just couldn't pull the trigger @ multiple rungs when I thought that TIPs prices were too high. Of course they did nothing but get more expensive. 😡. I own TIPs funds and individual TIPs- about 25% of my bond holdings. Looking to add to that percentage when the price compared to nominal Treasurys is favorable. I personally believe that TIPs/Ibonds should dominate fixed income portfolios of individual investors.