From what I'm thinking the addition of a ballast in the circuitry would reduce efficiency somewhat, and I agree if you aren't replacing tubes but every 4-5 years or more then retrofitting may be not really be a good investment. It sort of reminds me of when LEDs would be improved from something like an XML to XML2 and so on, upgrading the LED in your light for just efficiency wasn't worth the trouble most of us wanted more than 10-20% increase, for me 50% increase would be a starting point and in the flouro to LED conversion 20 extra lumens/watt doesn't cancel out a lot of work and costlier components. I wouldn't consider 120 lumens/watt worthwhile if It only saves me less than a dollar a year in power because my usage isn't high. When I was considering replacing a 4 foot flourescent T12 fixture with LED I first looked at prices of LED tubes and at $20 for a pair vs about the same for a native LED fixture that was higher output that the tubes were and the fact I have a few t12 tubes I bought used for $1 each from the Habitat for Humanity store about 5 years ago I decided to wait till those tubes or the ballast dies before bothering with it allA few years ago when I last really looked into the category, it was impossible to find mains-powered LED tubes at big box home centers.
Hyperikon was a reliable source on the 'zon, but it seems they shut their doors in June 2020. I gather that Satco is a reputable make - they don't sell direct so scouring their site for candidate part numbers to hit up online retailers with is recommended. Note that a great many of their products require ballasts or external drivers so read descriptions carefully. Efficiencies are better than floro, but not mind-blowing - the main benefit is the considerable lifespan increase and the removal of a ballast from the system.
I gather that there are several distinct topologies of electronic ballast and making a LED tube that's nominally compatible with more than one is ... difficult.
If the thing lasts a good 10 years in service, that's arguably a step up on the annual relamp cycle that floros typically demand for 24x7 operation typical in commercial/industrial settings. However such extravagances are seemingly limited to retail and upper-tier office spaces - elsewhere more utilitarian linear fixtures will likely be retrofit continuously until no longer economically feasible or their host building is gutted or demolished.
The sad thing is you can't get screw in bulbs for decent prices at all with nearly as much efficiency a 4 foot LED tube is a lot better deal than a screw in bulb.