When it comes to neck splits, there are two other issues apart from the original factory brass annealing quality. First is case-neck to chamber fit. Most sporting rifles have pretty generously dimensioned neck sections in the chamber. A lot of clearance = a lot of neck expansion on firing and then more resizing used, both increasing stress on the brass and accelerating work hardening. Thin-neck brass increases case to chamber clearances aggravating this problem, and Norma has on occasions produced case-lots with very thin brass indeed that was fine in 'minimum SAAMI' match chambers, but soon produced neck splits on reloading for slacker sporting rifles. Back in the 1980s I bought nearly 1,000 Norma 150gn PSP 308 Win cartridges at a ludicrously low price from my local gunshop whose proprietor had a very close relationship with Roger Hale MD of Parker-Hale, the then Norma UK distributor. The reason for the 'sale price' was 0.012-0.013" thick necks some two to three thou' undersize. In an ordinary sporter, they were fine for a single firing, but soon split if reloaded and Norma customers of those times expected several firings from their brass or the ability to sell them to people willing to pay a good price for once fired examples. The cartridges were sold as being 'unsuitable for reloading' and had been sold as a clearance nearly scrap price by Parker-Hale to the dealer.
I still have many of these 160gn weight cases (~35gn lighter than Lapua) and in tightly chambered FTR competition rifles, their life is good even without annealing.
The other factor - which also applies to my old 160gn Norma brass life - is the sizer die type used. A standard factory FL or NS dies deliberately sizes necks down far more than needed and then re-expands them back up to a dimension which produces a high neck tension value. Match shooters mostly use bushing dies nowadays with bushing sizes sizing necks down a great deal less and also resulting in much reduced tension on the bullet. Both factors reduce work hardening / stress and neck splits are rare as a result. Using a 308 Win FN Special Police Rifle as an example, I once measured how much neck-wall movement Lapua brass went through on a single firing / resizing / bullet seating cycle. With a standard Lee FLS die, it totalled 44 thou'; with a bushing die that was reduced by more than half. In a 'minimum SAAMI' match chamber allied to bushing dies and light neck tensions, it reduced to just under 10 thou'. I always exceeded half a dozen firings from my thin, cheap Norma cases without splits or annealing, and if / when scrapped it was as a result of heavy loads expanding the case-head / primer pockets.
Some long-range F-Class and BR competitors now anneal their cases after every firing before reloading them. In good brass fired in tight chambers, I do it on every fourth or so reload and that seems to work well for me.