Multi-tenant serving economics overwhelmingly favor parameter-efficient adapters over full-weight updates. This structural reality underpins our expectation that commercial per-customer customization will heavily rely on LoRA. Technical headwinds against adapters under sequential learning regimes are counterbalanced by the sheer operational efficiency of multi-tenant adapters, anchoring the median at 18.0%. Set against related questions, the distribution of percentiles (including 5.0% at p10 and 10.0% at p25) consistently reflects that multi-tenant serving economics heavily favor adapters over full-weight updates. The upper bounds (30.0% at p75, 45.0% at p90) account for the emergence of premium, full-lifecycle programs offering bespoke, full-weight checkpoints. However, projections that complex per-customer weight-merging architectures will not mature until the 2030s, with a 10th percentile for maturity only in 2031 , constrain upside scaling for full-weight updates. Market composition shifts, including major labs phasing out self-serve fine-tuning, further consolidate the surviving market into a split between open-weight adapter deployments and rare premium full-weight enterprise deals.
Set against related questions, these percentiles were slightly adjusted to consistently reflect that multi-tenant serving economics heavily favor adapters over full-weight updates.
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