Considering the uptick in lifter roller failures over the past few years, I suggest that a very close inspection of each lifter might be worth the time. But wholesale replacement at relatively low mileage shouldn't be necessary unless someone is a little more paranoid than normal. Considering the reports of failures at very low mileage with SE and Jim's lifters, you could be removing perfectly good stock parts and replacing them with timebombs, who knows?
As for super duper high output oil pumps, pay attention to what Deweysheads (Don) mentioned. Pinion shaft runout can and will destroy some of those pumps in short order, and the "benefits" of trying to force twice as much oil through the same passages are highly overrated anyway. Where does anyone suppose all that extra oil goes that those super duper pumps supposedly put out? I'll tell you where a lot of it goes, around in a circle thanks to the bypass system or dumped straight into the crankcase by the piston jets. Pumping a lot more oil than your engine can use takes more power to run the pump, and it heats up, shears, and aerates the oil. And if you manage to force a lot more oil up into the heads, the marginal drainback setup could be overwhelmed and create other problems. Increasing the scavenge capacity of the pumps might be beneficial, but jacking up the output side not so much.
It's not my money so in the end it doesn't really matter to me one way or the other if folks want to waste hundreds or thousands of dollars on stuff they don't really need for a street engine. As I've mentioned before, the Harley aftermarket depends on a lot of misconceptions to market big buck "racing" parts to folks who basically cruise down to the local watering hole on the weekend, or maybe even do some long distance touring, but do not "race". If it floats your boat, go for it. Just don't expect to really see all those supposed huge benefits hyped in the ad copy. And don't be terribly surprised if some of those "racing" parts don't last as long as the cheap stock stuff. Ask the Jim's customers about that one.
JMHO - Jerry